I've been having problems with fonts on my computer for awhile. Seemingly at random, they go "blank". The files are there and everything...but when you go to preview the font nothing is there. This causes applications to either substitute an awful font for the missing one, or just print out nothing when it uses that font. It happens to both system fonts and fonts I have installed. Today I finally came to the realization that this happens after a free space wipe with Eraser 5.7. Is eraser known to cause this, and what if anything can I do about it?