Intelliprompt member list completion and non-normal chars.

My language supports identifiers with a trailing '%' or '$' symbol. When I begin typing one of those symbols and it is matched in the list (if I type the entire item), and then hit %, it puts two %'s, as if it's replacing my stuff before the % with the ID. How can I tell the member list which chars to exit based on? It seems to think the % is an operator in my language.

Thanks,