Xperia X10 :: Cannot Delete Text Message Conversations

I have upgraded my X10a to 2.3.3 about two months ago without incident, so I don't know if this problem has anything to do with the upgrade itself since I did not have this problem in 2.1. However, I cannot delete text message conversations in the 2.3.3 stock rom. This is what is happening: when I attempt to delete a message it goes through the cycle but the message still appears with a subject "no subject", a date of "12/31/1969" and a time "19:00" in Handcent SMS. In Messaging I have opened blank messages and pressed delete conversation and then confirm to delete, but the result is message deleted. When I review all my conversations, the message I just deleted still appears in messaging. I have cleared both the Messaging and Handcent SMS application's data and cache. Rebooted the phone and guess what; all the conversations remain. What gives..