As described in this question I could not open Open Type in Eclipse via Ctrl+Shift+T.
The clue is: When I go to Preferences -> Keys and delete the shortcut, I’m not able to re-add it with Ctrl+Shift+T. Every other combination works, but when I press T, the box gets empty.
I use KDE 4.7.1
I’ve found the problem: In some views some command groups are disabled. (Probably by another plugin)
Solution: Go to
Window->Customize Perspektive->Command Groups Availabilityand make shure to enable “Java Navigation”.