iOS bugs? iOS 5 differences in comparison to iphone 4?

Oka apart from the ios 5 update taking for ever, understandable considering the amount of traffic there must have been. any issues? now i for one had to reset my iphone 4 due to error and literally my iphone froze and then finally went in to recovery mode after rebooting the iphone. finally up and running i have noticed the volume is playing all sort of games randomly does mega loud at times as well wont fully go down at times strange! fanally the wifi sync? i got it up and running plug it in to the mains and macbook near but yet still struggles to pick anything up. All these problems i HOPE are apart of ios5 being new and hopefully with a near update will sort it. Now iphone 4 in comparison to iphone 4s now the iphone4s its def brighter and the vibrate is most def different. Any other people experieced anything similar?