Problem with phone controls while talking on ios4

[octizzle]

I upgraded to 4.0 on my iphone 3g and im jailbroken and everything is working fine.
however when i make calls the screen goes black and i cant put them on speaker/hold/mute and all that jazz. To hang up i have to just keep pressing the power button until the screen comes back on.

i was ust wondering if this has happened to anyone else or if anyone could help me out

I've restarted/restored so its a reoccuring problem

 

[draz]

Nothing is covering the proximity sensor on the top left is it?

 

[octizzle]

no. i have a speck candyshell case but it worked just fine on 3.1.3

 

[don pianta]

the exact same thing is happening to me... and for all of those who say that ATT did this on purpose to piss off people who jailbroke... well i think that's a load of crap.

it's really annoying... anytime i get a phone call while in the middle of doing anything i have to put the call on speaker...