Notification screen brought up when talking on the phone?

[andsoitgoes]

Okay, this is strange but it keeps happening.

I'll answer a call, start talking and then when I pull away, the light sensor kicks in and the screen comes back, but the "Notification" window is open. The light sensor is working, I can see that it turns off once it's against my head.

This happens regularly, but not constantly. Is my ear just so fat it's hitting the "Notification" bar too quickly when I put it against my head, prior to the sensor turning off?

Any thoughts on how to fix this? That stupid notification area pains me sometimes!