I did right click on an item... and selected Resize All. It gave me a message box "Resized" and doing an alt tab didn't display anything then.
I checked windows task manager and was taking 9 to 13% cpu usage.
I killed and restarted the application and it's back fine.
Interesting though, it's still eating up CPU cycles.
When i press ALT-tab and keep it pressed the CPU usage goes down to zero. When i do an alt-tab it peaks to 30% for a second and then back to zero. (During that second, the icon on which it will go next, will be cleared and redrawn. The redraw time of a second is quite slow