HI, Just incase anyone finds this post I fixed this issue by removing the MANIFEST file in another .jar - I thought I'd already done this but had accidently bundled my Apache library twice.
This thread explains more: http://groups.google.com/group/google-appengine-java/browse_thread/thread/72113438a6c46c5d Cheers John -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.