I know a lot of people get this i was just wondering if there is a fix
every time the game finishes my client just closes no i never get to see the stats at the end of the game its really started to annoy me
is there any fixes?

Along with the really annoying stutter problem, I've started to have this also. Last patch was really bad, I'm very interested in a fix also as I like to look at the stats after the game, and honor puerile who deserve it.

Mikezy,

There are two possible causes for the crash. The first is that Adobe Air crashes when it is brought back up. You can try updating it to version 3.6 here: http://get.adobe.com/air/

The second is that your air client files are a bit corrupt. You could try to replace them this way:
Navigate to:
harddrive/Program Files/League of Legends/RADS/projects/...
delete the two folders 'lol_air_client' and 'lol_air_client_config_na'
Run the LoL Launcher, hit the cogwheel in the upper right hand corner.
Run a repair, let it finish, it'll download the deleted folders.
Run the game, test if you can play a game and load back up.

Lastly, if that doesn't work, it might be an actual issue with the game files. You could delete the game files and repair them, much like the above, only they would exist under the folder names of: 'lol_game_client' and 'lol_game_client_en_us'

The first step takes all of 5 minutes. The second and third can take hours depending on your internet connection.