Build: NetBeans IDE 7.0.1 (Build 201107282000)
VM: Java HotSpot(TM) 64-Bit Server VM, 20.1-b02, Java(TM) SE Runtime Environment, 1.6.0_26-b03
Maximum slowness yet reported was 43339 ms, average is 23513
Created attachment 114386 [details]
The snapshot seems to be invalid as it covers only 430ms and not 43s.
Here is a valid snapshot
This is a duplicate of a bug Jarda already has somewhere. I would suggest to keep lastModified status of the file and don't query its mime type when its type remains the same.
*** This bug has been marked as a duplicate of bug 233429 ***