I bought a BB Bold 9900 and just transferred everything from my old 9780. I am receiving the popup:

"Blackberry message memory is full? Please delete some SMS messages."

after every sms I receive.

This is quite annoying. And I have around 13k SMSes+MMSes being transferred from my 9780 to 9900.

I tried to go to 'option' and have unchecked the 'store messages to the SIM card', but the problem still persists.