(bug?) xemacs not releasing colors?

I don't have a reproducible case yet but it seems that after viewing some gifs from this list in Gnus then killing all Gnus buffers and doing M-x garbage-collect that XEmacs is not as good about releasing the colors it has sucked up as it used to be. Anyone else experiencing this? The only thing I've been able to reproduce is not freeing the xemacs logo colors after xemacs -q and then M-x garbage-collect. But loading an image in image-mode and then killing the buffer and garbage collecting does seem to free the colors. I've been sticking with the older Gnus package so that shouldn't be an issue. Is there a way to find all the image instances in a running XEmacs? greg