iOS5 Beta 7 - Camera Roll issues

Before I submit the bug to Apple (probably too late anyway), was just wondering if anyone else has come across this issue.

I took a video yesterday, it played fine and I even uploaded it to FB so I know it was ok. About 2 hours later I took another video. This video did not save correctly and when I clicked to play, I got a URL could not be found. Furthermore, this second video somehow corrupted the first which wouldn't play with the same error.

I transferred to my PC this morning and both video files are of size 0.

Al through the betas I've had unreliability issues with this area of the phone, every other area has been very stable. On several occasions pics taken did not get saved at all. It seemed to happen more often when I went to the camera directly from the lock screen.

Anyone else had similar issues?