Then, I suggest you let them know. http://www.amd.com/us/aboutamd/contact-us/pages/contact-us.aspx
They may have a driver fix for you or you might have found a driver bug.
In the meantime, you can always run with the older driver.
If you access Device Manager > Display Adapters > HD 4650 Radeon
Right click to get Properties > DriverRoll Back Driver