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When input some characters, and perform Undo/Redo only with Edit menu, I can restore my file to the original unmodified state, and so does the file comment. The modified state (the "*" sign) of the file works fine. Redo works fine both in modified state and file comment. If I use shortcut Ctrl+Z/Ctrl+Y instead of menu items, I found that Undo/Redo may also works, but modified state didn't restore/change. And if I use shortcut and menu item mixed together to perform Undo/Redo, I found that I can't make it work correctly. It appears in NetBeans IDE 6.1 RC1 (Build 200804100130), Windows XP SP2, Java 6 platform.
yes, this is already reported as isses 132590. Thanks anyway. *** This issue has been marked as a duplicate of 132590 ***