Black screen bug during call post upgrade

[Guest Gibber_uk]

Hi all I've been on infusion b03 for a while working great but thought I'd try a new rom. Tried cm9 r3 and r4 and infusion b06. In all three upgrades im getting a stuck black screen during call, the screen doesn't come back till the call ends. A nandroid restore of b03 fixes the problem. Anyone got any ideas?