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Product Version = NetBeans IDE Dev (Build 201003260201) 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
Problem is not present any more in 201003270201.
Since build 101003270200 I am not experiencing this problem anymore.
Closing the report as works for me.