Eclipse Helios ignores breakpoints

Eclipse is driving me nuts right now. It's probably something trivial but I just don't get it. Whenever I like to add a breakpoint, the regular icons are crossed out in the editor and breakpoints view.

As you might have guessed, this isn't strictly a graphical problem ;) The breakpoints are simply ignored while debugging. The breakpoint's properties aren't helpful either.

Any h开发者_开发百科int is very well appreciated!

EDIT:

• I've tested different JDKs without success.
• I've successfully debugged projects in another workspace

Okay, so it's not about the JDK or the installed plugins. Seems to be workspace related. Anything I could try?

It seems you have the Skip All Breakpoints option enabled in the Breakpoints view.