I started a game today and got to the loading screen with all the character portraits. It loads mine to about 70% and then crashes and gives me the option to report the crash.
Every time I try to reconnect to my game the same thing happens.
How do I fix this and how do I make sure I'm not going to be reported for being a leaver?

Leche,

Try taking a look at the fixes here, http://na.leagueoflegends.com/board/...ad.php?t=52018

In order to make sure you don't get banned, please make sure you do any testing in Custom games until you get this issue fixed.