when I add a folder to the finder sidebar it acts fine for a while, but tends to lose its icon when its contents are modified. the default icons are fine.
Im running 10.3.3 without any strange programs, I first noticed it with the original 10.3 though
I do both on a more or less irregular basis, and although the icons go back to normal after a restart or logout its not really a solution. oh well, I think Ill just have one non default icon in my sidebar for now, so the blank folder is always it