Does this compile correctly using scalac on the command line?

Yes,it can compile correctly using scalac

What version of scalac?

2.7.7 and 2.80 both can compile it correctly.

In your Eclipse workspace, do you 2.7.7 compiled binaries (ie. .jar files) on your classpath? If you do, could you replace them with 2.8.0.final compiled binaries and let me know if that resolves the problem for you.

here is my .scala_dependencies, does it has problem ?

C:\project\scala28\gizzard\gizzard_prefz\bin;C:\Program Files\Java\jre6\lib\resources.jar;C:\Program Files\Java\jre6\lib\rt.jar;C:\Program Files\Java\jre6\lib\jsse.jar;C:\Program Files\Java\jre6\lib\jce.jar;C:\Program Files\Java\jre6\lib\charsets.jar;C:\Program Files\Java\jre6\lib\ext\dnsns.jar;C:\Program Files\Java\jre6\lib\ext\localedata.jar;C:\Program Files\Java\jre6\lib\ext\QTJava.zip;C:\Program Files\Java\jre6\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jre6\lib\ext\sunmscapi.jar;C:\Program Files\Java\jre6\lib\ext\sunpkcs11.jar;C:\develop\Aptana\eclipse\configuration\org.eclipse.osgi\bundles\896\1\.cp\lib\scala-library.jar;C:\develop\Aptana\eclipse\configuration\org.eclipse.osgi\bundles\896\1\.cp\lib\scala-dbc.jar;C:\develop\Aptana\eclipse\configuration\org.eclipse.osgi\bundles\896\1\.cp\lib\scala-swing.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-lang\scala-compiler\jars\scala-compiler-2.7.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-lang\scala-library\jars\scala-library-2.7.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools\vscaladoc\jars\vscaladoc-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\markdownj-1.0.2b4-0.3.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\slf4j-jdk14-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\junit-4.5.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\configgy-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\xrayspecs-1.0.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\naggati-0.7.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\scala-library.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\slf4j-api-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\mina-core-2.0.0-M6.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\libs\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\kestrel\jars\kestrel-1.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.slf4j\slf4j-api\jars\slf4j-api-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\naggati\jars\naggati-0.7.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\junit\junit\jars\junit-4.5.jar;C:\Documents and Settings\Administrator\.ivy2\cache\markdownj\markdownj\jars\markdownj-1.0.2b4-0.3.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.apache.mina\mina-core\jars\mina-core-2.0.0-M6.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.slf4j\slf4j-jdk14\jars\slf4j-jdk14-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\xrayspecs\jars\xrayspecs-1.0.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools.testing\specs\jars\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\thrift\libthrift\jars\libthrift-0.2.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\commons-logging\commons-logging\jars\commons-logging-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\log4j\log4j\jars\log4j-1.2.12.jar;C:\Documents and Settings\Administrator\.ivy2\cache\logkit\logkit\jars\logkit-1.0.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\avalon-framework\avalon-framework\jars\avalon-framework-4.1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\javax.servlet\servlet-api\jars\servlet-api-2.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\commons-lang\commons-lang\jars\commons-lang-2.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\json-1.1.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\netty-3.1.5.GA.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\cglib-2.1_3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\logkit-1.0.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\configgy-1.5.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\scala-library.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\asm-1.5.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\hamcrest-core-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\avalon-framework-4.1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\hamcrest-all-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\log4j-1.2.12.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\commons-lang-2.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\mockito-core-1.8.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\objenesis-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\commons-logging-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\xrayspecs-1.0.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\libs\servlet-api-2.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\ostrich\jars\ostrich-1.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\cglib\cglib\jars\cglib-2.1_3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\asm\asm\jars\asm-1.5.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.hamcrest\hamcrest-all\jars\hamcrest-all-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.jboss.netty\netty\jars\netty-3.1.5.GA.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.objenesis\objenesis\jars\objenesis-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.mockito\mockito-core\jars\mockito-core-1.8.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.hamcrest\hamcrest-core\jars\hamcrest-core-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\libthrift-0.2.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\jmock-2.4.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\logkit-1.0.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\asm-1.5.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\ostrich-1.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\slf4j-api-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\avalon-framework-4.1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\hamcrest-library-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\commons-lang-2.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\mockito-core-1.8.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\objenesis-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\commons-logging-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\servlet-api-2.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\json-1.1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\netty-3.1.5.GA.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\cglib-2.1_3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\kestrel-1.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\querulous-1.1.11.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\scala-library.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\mysql-connector-java-5.1.6.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\configgy-1.5.4.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\hamcrest-core-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\hamcrest-all-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\log4j-1.2.12.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\slf4j-jdk14-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\xrayspecs-1.0.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\commons-dbcp-1.2.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\libs\commons-pool-1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\gizzard\jars\gizzard-1.3.8.jar;C:\Documents and Settings\Administrator\.ivy2\cache\mysql\mysql-connector-java\jars\mysql-connector-java-5.1.6.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\configgy\jars\libs\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\configgy\jars\libs\scala-library.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\configgy\jars\libs\json-1.1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\configgy\jars\libs\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\net.lag\configgy\jars\configgy-1.6.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\json\jars\libs\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\json\jars\libs\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\json\jars\libs\scala-library.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\json\jars\json-1.1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\commons-pool\commons-pool\jars\commons-pool-1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\cglib-2.1_3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\configgy-1.5.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\jmock-2.4.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\scala-library.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\asm-1.5.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\mysql-connector-java-5.1.6.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\hamcrest-core-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\hamcrest-all-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\hamcrest-library-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\objenesis-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\xrayspecs-1.0.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\specs-1.6.2.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\commons-dbcp-1.2.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\libs\commons-pool-1.3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\com.twitter\querulous\jars\querulous-1.1.11.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.jmock\jmock\jars\jmock-2.4.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.hamcrest\hamcrest-library\jars\hamcrest-library-1.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\commons-dbcp\commons-dbcp\jars\commons-dbcp-1.2.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools\vscaladoc\jars\libs\scala-compiler-2.7.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools\vscaladoc\jars\libs\scala-library-2.7.2.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools\vscaladoc\jars\vscaladoc-1.1-md-3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\junit\junit\jars\junit-4.7.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.eclipse.mylyn.wikitext\wikitext\jars\wikitext-0.9.4.I20090220-1600-e3x.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.eclipse.mylyn.wikitext\wikitext.textile\jars\wikitext.textile-0.9.4.I20090220-1600-e3x.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scalatest\scalatest\jars\junit-4.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scalatest\scalatest\jars\scalatest-1.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools.testing\scalacheck\jars\scalacheck-1.6.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.scala-tools.testing\test-interface\jars\test-interface-0.4.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.jmock\jmock-legacy\jars\jmock-legacy-2.5.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.jmock\jmock\jars\jmock-2.5.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\cglib\cglib-nodep\jars\cglib-nodep-2.1_3.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.mockito\mockito-all\jars\mockito-all-1.8.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.easymock\easymock\jars\easymock-2.5.1.jar;C:\Documents and Settings\Administrator\.ivy2\cache\org.easymock\easymockclassextension\jars\easymockclassextension-2.4.jar;C:\Documents and Settings\Administrator\.ivy2\cache\javax.script\script-api\jars\script-api-1.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\javax.script\script-js\jars\script-js-1.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\javax.script\js-engine\jars\xbean.jar;C:\Documents and Settings\Administrator\.ivy2\cache\javax.script\js-engine\jars\js-engine-1.0.jar;C:\Documents and Settings\Administrator\.ivy2\cache\jmock\jmock\jars\jmock-1.1.0.jar
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because many depended package compiled by 2.7.7. if I change it to 2.80.0 ,those depended package can not be loaded.

Well, for a start you have the scala 2.7.2 compiler and library jars on your classpath! I'm afraid that to be able to use the current version of the Scala IDE for Eclipse you will have to update your project fully to Scala 2.8.0.final. I'm going to close this and your other tickets (which look related) for now. If when you've updated to 2.8.0.final you can reproduce any of these issues then please reopen the appropriate tickets.