[ialex]

It still happens, i have seen here in Mexico in the Gov Agency that collects taxes when they send something to print/export pdf's they keep moving the mouse or their progress bar doesn't move at all. But they made this natural i think it is part of the training they receive, maybe some devs there tough it was the only way to get the rid of that bug, JUST KEEP MOVING THE MOUSE!.

Agency url: http://www.sat.gob.mx/sitio_internet/home.asp

[umanwizard]

Sounds like they do their long-running process in the event loop. It's an easy mistake to make for someone writing a Windows app for the first time.