This bug was originally marked as duplicate of bug 173684, 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 web-main-2935-on-100406)
VM: Java HotSpot(TM) 64-Bit Server VM, 14.3-b01-101, Java(TM) SE Runtime Environment, 1.6.0_17-b04-248-9M3125
OS: Mac OS X
pjiricka: Confirming web project properties dialog.
Maximum slowness yet reported was 4074 ms, average is 4074
Created attachment 96784 [details]
WebSource does not exist anymore - the code was refactored to use version from J2SE project which is most likely optimized.