This bug was originally marked as duplicate of bug 203116, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 7.2 Beta (Build 201205031832)
VM: Java HotSpot(TM) Client VM, 23.0-b21, Java(TM) SE Runtime Environment, 1.7.0_04-b20
Maximum slowness yet reported was 7194 ms, average is 7194
Created attachment 120325 [details]