IOS 4 : All the Problems Encountered So Far

Following 4 iPhone review with first impressions running IOS 4 analysis points to some of its best ( the foldersThe multitasking and lock screen rotation) , the bugs and problems with the firmware update has been made to wait . Consulting the complaints / requests for help / opinions from users on the Internet, I collected the most common problems after updating with IOS 4.
The first problem , manifested in many users now , concerns the timing of the firmware update : After connecting to iTunes for backup and synchronization , updating the iPhone asked for hours . In some cases particularly unlucky , the iPhone has restarted during the procedure, forcing him to start over .
The quality of the photographs is much complained of a bug : after syncing with iPhoto , all images appear on iPhone "blurry"Or blurry . Some users have solved the problem by performing a sync again , for others, the problem persists.
As we reported , with video demonstration , many iPhone 3G have become incredibly slow after upgrading to IOS 4. The animations are a snap , the applications are three times slower to open and sometimes you can not use the virtual keyboard. Even the 3G connection seems to have suffered some terminal upgrade , no longer works properly.
Mail application tends to hang especially on 3G in the open , whether it be during an attempt to delete e-mail . In many cases the mail settings are reset automatically , and in other cases , the emails are no longer being sent despite the settings are correct.
As often happens after upgrading to a new firmware , there are complaints about battery life : some appear to be declining significantly . These are the most common issues and discussed , let us know your experiences , problems encountered and possible solutions you have tried .