Please see the related discussion on the Google Group:
http://groups.google.com/group/liftweb/browse_thread/thread/376ae47e5075c71d/86b4690bcb01d15a#86b4690bcb01d15a


Ive just upgraded my project from 2.9.0-1/2.4-M3 ----> 2.9.1/2.4-M4 and Ive noticed one regression.

Snippet:

def test = {
 val myIdList = List("xx1", "xx2", "xx3", "x4")
 ".thinglist *" #>
      (".thing" #> myIdList.map(t => {
          ".thing [id]" #> t.key
        })
      )
}

Template:

<ul class="thinglist lift:MySnip.test">
      <li class="thing" />
</ul>

...should result in:

  <ul class="thinglist">
      <li class="thing" id="xx1"/>
      <li class="thing" id="xx2"/>
      <li class="thing" id="xx3"/>
      <li class="thing" id="xx4"/>
   </ul>

...but with 2.4-M4, it results in:

  <ul class="thinglist">
      <li class="thing" id="xx1"/>
      <li class="thing "/>
      <li class="thing" />
      <li class="thing" />
   </ul>

It looks like only the first li gets the "id" attribute.
Even stranger, if I change the attribute that is being added from "id" --> "idblah", it works properly.