Cover Flow mode crashes on iOS 5.0.1

Hi,

I've just upgraded my iPod touch 4 to iOS 5.0.1. As a result, I can't use Cover Flow at all because it causes 'Low Memory' error and, as a result, stops playing, shows a rotating progress bar and 'Enter Passcode' screen at the end. (BTW, I have only a few albums on the device not, not hundreds or more)

Thus, the only way I fixed it now - locked screen rotation in Portrait mode preventing Cover Flow. But it's not a best option, I'm sure.

Could anybody suggest how to reduce overall RAM consumption? I've turned off such things as FaceTime etc, disabled most of notifications. It didn't help. I've read here only about slow Cover Flow, but not about crashing.

In addition, I'd be glad to be able to downgrade back to iOS 4.3.5. But seems I can't do it legally, can I?

BTW, why iTunes doesn't give me a chance to decide to do upgrade or not? For example, it can display a requirements of new OS version, compared with device hardware I have, therefore I can see that 256 MB RAM is not enough. It would be fair. But now I'm at 'trap' - iTunes didn't prevent updating which actually makes things worse, but doesn't allow to downgrade back...

Thanks