Hi katyrrell,
Thanks for letting us know about this. I've seen one or two reports of this nature come in through support recently and our engineering team is looking into those. I don't think we're aware of all the circumstances that can cause this yet though, so we could definitely use some more reports.
If you have not already done so, I recommend contacting our customer support team about this using the web form on the following page of our site:
http://www.auctiva.com/help/requesthelp.aspx-Mike