I'm using version 6.015 on a 64bit Windows 7 OS. I saved waypoints and tracks from a Garmin Oregon to a newly created file Geodatabase. They were created, but when you try to open them in ArcMap 10.0, you get an error saying the the item and XML does not have a definition (see attachment). I set the projection to NAD83, UTM18N. This had issues in the last version as well where the geometry of the feature class was corrupted...but this is even worse now.