I just posted this experience over at DPR, because I thought I had seen a reference to a similar experience there. Just in case anyone here can offer some insight... I've noticed that sometimes my E-P3 becomes partially unresponsive. Some buttons work, some don't. Turning off/on doesn't help. Removing, reinserting battery doesn't help. The only thing that consistently cures the problem is removing the VF-2 (It's hard to use the word 'consistently' when it has happened so infrequently!) In the week I've had it, the problem has only come up 3 times. At first I just thought I had accidentally put it in a mode where it was expecting me to do something, but I'm now convinced that isn't the case: there just aren't any such 'modes' that can't be cleared with power down/up. I haven't found any way to repeat the problem - it just happens sometimes. Anyone else had this issue? Maybe it's my unit - or my VF-2. Or a FW bug.