Comment 93 for bug 618587
something related to #72 and other comments. Key binding in main menu changed and editor do not work, in fact context menu report the right binding. I had to revert with

cd /usr/lib/x86_64-linux-gnu/gtk-2.0/2.10.0/menuproxies
sudo sed -i 's/Xclipse/Eclipse/'

Here ubuntu 12.10, and eclipse 3.8 (ubuntu default repository), 64bit.

To be fair this does not look as as solution, at least not if you are using PDT, or it is a pdt-incompatible solution, for now

I can do tests and post configuration, just ask