This bug was originally marked as duplicate of bug 185334, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 7.3 Beta (Build 201210011125)
VM: Java HotSpot(TM) Client VM, 22.1-b02, Java(TM) SE Runtime Environment, 1.7.0_03-b05
OS: Windows 7
Created attachment 125619 [details]
Reported for 7.3.x or earlier, no new info since then -> closing as worksforme, please reopen in case you see it.