Problem with pending messages - they don't display attachments.?

I own/moderate 10 Yahoo! Groups for which I must approve all postings. I go to the Pending Messages and click a message but the .jpg attachment(s) won't display. What I do get is a message saying Python Error: <exceptions. System Error instance at [what appears to be a number specific to the individual attachment]>. Anyone have any insights about this? I've reported it to Groups Help and received an auto-generated response saying that I'll be contacted by someone. Should I just be patient here? Does anyone have any insights as to why this is happening. I've never had such a problem before. Thanks.