Hi Kramerica,
Thanks for letting us know this was still happening to you. We have since pushed out another fix that appears to have resolved this problem, so you should now be able to post and save your listings once again. I posted this info on the thread I referred to earlier as well.
If you have any additional questions or concerns, please feel free to contact our customer support team using the web form on the following page: http://www.auctiva.com/help/requesthelp.aspx
-Mike