Create a file in your home folder (or wherever you want) called eclipsefix.sh – open it and add the following lines:
export GDK_NATIVE_WINDOWS=true
/opt/eclipse/eclipse
then
chmod +x ~/eclipsefix.sh
got this from
http://mou.me.uk/2009/10/31/fixing-eclipse-in-ubuntu-9-10-karmic-koala/
Eclipse/Aptana bug fix on Ubuntu 9.1
Jan, 18 -- Categories: Linux