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[ BUILD # : 201101040001 ] [ JDK VERSION : 1.7 ] While working with GUI builder forms in a NetBeans module project, switching from the design view of a form to source view frequently (but not always) causes the application to stop responding entirely. This seems to be a JDK 7 specific problem - using JDK 6 update 12, this never happens.
It can be bug 187697 - you may be using a JDK build where the bug is still present. Should be fixed in JDK 6 u23 and JDK 7 since build 102. If you can, please try latest JDK 7 build and let us know if it still happen - then attach a thread dump and reopen this bug. Thanks. http://wiki.netbeans.org/GenerateThreadDump
Tried it with JDK 7 build 128, and it seems that your assessment was correct. The problem has been resolved. :)
Ok, good to hear it works now. *** This bug has been marked as a duplicate of bug 187697 ***