I've got the same issue with KLC, also have several legacy reports which no longer run and cause 100% CPU usage on the box :(
Back on topic, my upgrade was far from pleasant, a 4hr saga last night finishing at 1am (Thankfully for the tennis it wasn't as bad as it could of been). First time through SQL errors sprung up 80% of the way through. Following the process again finally ironed the issue out, but I've got a fair few issues with policies now... long day ahead.