I would give it a try with

JeevesBond — Fri, 15 Aug 2008 02:41:34 +0000

I would give it a try with Ubercart, although I've used the userpoints module personally and have found it -- and possibly the satellite modules around it -- to be rather flaky.

Apparently I'm not the only one, Morbus (a well known member of the Drupal community) was complaining about the module on IRC the other day. Apparently he tried giving them some feedback, but they refused to listen. I wasn't 100% paying attention to the conversation, so don't quote me, but that's how I remember it.

Maybe if you could pin down exactly where the problem is occuring, in what module and under what circumstances, you might be able to create a bug report the devs will listen to. Worth a try.