I recently updated my computer to a more powerful one, with a quad-core hyperthreading processor (i7), thus plenty of real concurrency available. Now I\'m occasionally>
I have the same issue ( Java 6 ).
I noticed an unknwon sun.awt.image.ImageFetcher thread in the debugger.
I think it comes from me using JButtons with Icons.
The ImageFetcher thread disappears after 2 seconds.
If the ImageFetcher thread is not running my programm exits just fine.