This bug was originally marked as duplicate of bug 190409, 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) 64-Bit Server VM, 20.0-b11, Java(TM) SE Runtime Environment, 1.6.0_25-b06
OS: Windows 7
GUEST: Tabbed into the program from other windows
Maximum slowness yet reported was 17221 ms, average is 17221
Created attachment 123010 [details]
Looks like very intensive I/O somewhere and the whole system seems overloaded.We might update the titles in a background however and also the repository updater might move its disk check to other thread, I guess.
I think that the whole system was in a bad shape - one call to NbBundle.getMessage took 6s. Closing as works for me.