Also, it should feature tons of extra stability improvements for the overall OS as well as small bug fixes that should offer better performance out of your device. (android.gs)
This update should fix a number of small bugs found in earlier builds, and should further improve the stability of the OS. (windowsphonearea.com)
Technical issue: We hate bug and try to fix all bugs but something still several small bugs on some devices. (apppcdownload.com)