Since yesterday, I get a strange error message when I start my Tomcat (6.0.35) under Eclipse Juno (build 20120614-1722):

Among the things I tried in order to get rid of the error:

• Check in Preferences -> Java -> Compiler if all "Classfile Generation" checkboxes where checked. I did that for both general preferences and project preference
• Uncheck them, build, check them build again (found on another question)
• Add org.eclipse.jdt.core.compiler.debug.lineNumber=generate to my .settings/org.eclipse.jdt.core.prefs file
• Use a new CVS checkout (same symptoms)

And now, I don't know what to do anymore. The problem is really stopping me from get anything done. I can't work anymore.

Crazy is: the problem doesn't happen on every class, only on some of them. Neither does it happen on my other Eclipse projects. And it didn't happen before yesterday, even if I can't remeber having done anything weird. Actually, I have never seen a problem like this in almost 10 years I'm using Eclipse...

If you have any idea, I would be really grateful...

Edit:

I also tried to ignore the message and go on with my tests: If I create another breakpoint upstream from my problematic class, when I enter this problematic class, it tries to open a $Proxy132 class, which means it actually opens an empty page, with a source not found message