I installed new eclipse on ubuntu 9.10, and noticed that manu of FINISH,
NEXT buttons are not working correctly ( you can’t click them).

So it found out it’s eclipse bug, but fortunately there is a simple
solution to this problem.

Write a startup script:

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

Save it as eclipse-run.sh make it +x, and the buttons will work now if you
run your eclipse via the run script.