Error creating discussion topics in BP SOCIAL

I'm running the latest version of BP Social Theme (1.18) on WP 3.0 with BP 1.252.

my site: http://theconfluenceproject.com

Up until now, everything as far as creating groups and topics has worked perfectly. I've created about a half dozen groups on my site, each with several discussion topics, however, seemingly out of nowhere, I had trouble creating a new group. I could create it, but when it gets to step 3 (add avatar), it doesn't open an option for uploading avatar, but instead says "try again."

When I go back to Groups admin page, the group I tried to create is actually created, but from there you can't create any topics for it, it says "there was an error creating this topic."

I saw a few other forum posts asking for support on similar sounding problems but no fixes.

Can anyone help