On AT&T legit with a jailbroken phone.

When I listen to a v-mail using visual voicemail and the phone locks it gets, well, stuck. I can't unlock the phone unless someone calls it AND I answer. Then we are all happy again. Otherwise it flashes to the VVM screen and immediately locks again.

Powering down my phone to work my way through voicemail is a time consuming way of picking up my messages...

Anyone seen this before (proving me sane) - more importantly, anyone fixed it?

Thanks in advance,