Some buttons in Eclipse 3.5 under Ubuntu 9.10 won’t work but short cut key works. It’s because SWT eclipse uses have some problem with the underlying GTK.

Also this will be fixed in eclipse 3.5.2, the is a work around for those older 3.5 releases. Write a simple shell script to start eclipse:

#!/bin/sh
export GDK_NATIVE_WINDOWS=1
~/bin/eclipse

Replace "~/bin/eclipse" with your eclipse path.