This bug was originally marked as duplicate of bug 179406, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE Dev (Build 201001280200)
VM: Java HotSpot(TM) 64-Bit Server VM, 14.3-b01, Java(TM) SE Runtime Environment, 1.6.0_17-b04
OS: Windows 7
emiddio: right click folder node in favorites
Maximum slowness yet reported was 21258 ms, average is 21258
Created attachment 93819 [details]
*** This bug has been marked as a duplicate of bug 179406 ***