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After more than one "Find Usages", an attempt to delete the latest tab throws an ArrayIndexOutOfBoundsException. Repeated attempts may render the IDE unusable with constantly repeating exception dialog boxes.
Created attachment 30910 [details] messges.log after exceptions
java version "1.6.0-beta2" Java(TM) SE Runtime Environment (build 1.6.0-beta2-b86) Java HotSpot(TM) Server VM (build 1.6.0-beta2-b86, mixed mode) 5.5dev build 200606010200
Yes is known problem, unfortunately it's jdk bug. Thanks for your report. *** This issue has been marked as a duplicate of 75955 ***