After upgrading to Ubuntu 9.10 (Karmic Koala) some buttons no longer work in Eclipse 3.5. Clicking has no effect but keyboard shortcuts still work.
It looks like Eclipse is doing some nasty stuff advanced hacking in SWT on GTK. This bug is fixed in 3.6M2 but you can work around the issue in Eclipse 3.5 by launching Eclipse through the following small shell script (assuming Eclipse is installed in /opt/eclipse-3.5):
If you're having this issue it will rear its ugly head when you try to do things like create a new project or add a software repository to your updates list--you'll click the "next" or "OK" button and nothing will happen. Glad there's an easy workaround, this has been driving me nuts all morning!