Care to elaborate on what the "COPY PASTE" error is?
If you copy to the clipboard from another source - web page, word processor, etc - and then paste that into a post edit panel on gunks.com, all the text after a certain set of characters will be truncated/removed/not appear - whatever you want to call it. I haven't tested it as extensively as oenophore et al, but it appears that this occurs after extended ascii characters. It's behaving like it's not using/respecting UTF-8 encoding. This may just be a setting in ubb threads or the content database may not be set up to use the full character set.
In any case, it's caused difficulty when trying to paste content into a post. The bug has been mentioned in this forum as well as others.