I experienced 2 problems after installing Cyanogen 10.2.0 hercules.
First was that I had only 400mb available out of ....2gb...
After 2 days of googling I found out the cause. Folder data/lost and found was 1.3gb.
Second problem is totally different. Almost every video I take has a defect and the picture is squared. I didn't have this problem before Cyanogen
Here is video I just made.