On Wed, 27 Feb 2013 10:14:07 -0800, Jeff Liebermann wrote:

Maybe a photo will help:
http://802.11junk.com/jeffl/pics/drivel/plastic-rot.jpg

That's EXACTLY what this screwdriver USED to look like!
http://www5.picturepush.com/photo/a/...g/12297573.jpg

So, whatever it is, it's common.

Again, I don't know if it is a mold or a chemical.
It does NOT happen to all tools of the same type.

It just happens to select tools which were stored in a
different environment (I think my affected screwdrivers
were used when I worked at a hospital on oxygen respirators).