Does PDM leak them out of explorer.exe?  You know, kinda like what Solidworks does with RAM?  Do they leak out of the box and down onto the floor?  Will they get stuck to the bottom of my shoes? 

Will my computer eventually run out of them or do I get a fresh set when I restart? 

It sounds like they have something to do with graphics?  Is this why I need to update my driver every couple months, to refill the jar?  Do fresh GDI handles come with the new graphics driver?