THIS QUESTION HAS NOT BEEN ANSWERED UNTIL APPLE FIXES!
After installing Snow Leopard SOME of the default system folder icons show up "fuzzy" (like, "Pictures," "Users," "Movies," etc). Its only some of them and it does not change over time...
I can understand why some of my personal customized icons are "fuzzy," though some are fine, and some disappear -- but I've fiddled with them -- BUT, the system generated ones?!?!?
UNACCEPTABLE! And quite (still) a mystery... Hence, this question is not answered -- please UNanswer it or I will start a new thread...