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I opened several windows in output area (e.g. several debugger windows or server output and app server node docked into bottom area, does not seem to matter which ones). Then I minimize them and restore. Then I hit the square icon (on winxp) that makes the window stay visible even when I move focus to another area (sorry, but I really cannot find the term) and I get this error. It does not go away until restart. It is 100% reproducible. I just updated from trunk and built from sources.
Created attachment 19141 [details] the error
duplicate, I fixed it yesterday. *** This issue has been marked as a duplicate of 51908 ***
verified in 4.2 20050729