iOS 5.0.1 beta is now available! You can get it on the iOS Dev Center . Even in low storage situations, it introduces a new way for developers to specify files that should remain on device.
The update also:
Fixes battery life
Adds Multitasking Gestures for original iPad;
Resolves bugs with Documents in the Cloud;
Improves voice recognition;
Apple has announced that as the matter of fact that they have added something to iOS 5.0.1.the problems with iOS 5 are being eliminated.
But the most important part of iOS 5.0.1 is still the non-critical storage. It does not slow down or eat up storage for your backups.
For more information, visit Apple website for Developers .