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Product Version = NetBeans IDE Dev (Build 201003200200) Operating System = Linux version 2.6.31-20-generic running on amd64 Java; VM; Vendor = 1.6.0_15 Runtime = Java HotSpot(TM) 64-Bit Server VM 14.1-b02 After opening file and making few edits if one keeps pressing ctrl+z or clicking Edit > Undo instead of been stopped (disabled) at point when undo of the first edit is done entire content of the file will be deleted on next press of ctrl+z or click on Edit > Undo. To reproduce: Open file (I tried html, css, js and php files), make few edits and then start pressing ctrl+z or click Edit > Undo
I just figured out that even with no edits made if one press ctrl+z or click Edit > Undo entire content of the file will be deleted.
*** This bug has been marked as a duplicate of bug 182299 ***