Problems with OS X 10.8.3 ? Solutions ?

Since I've done the upgrade to Mac OS X 10.8.3 my Mac has some problems and I would like to know If somebody else has my same problems and how to solve them. First of all, "Mission Control" seems to work slower, I mean it works, but when I "activate" Mission Control it works intermittently. Generally my Mac seems to be slower. I've tried to reinstall the operating system, but I haven't noticed improvements.

The operating temperature of my Mac now is on 60 degrees, before it was on 45-50 degrees.