Client keeps freezing during champ select.

This has probably happened to me about three times over the last two days now. It's cost me a bit of LP, and my brother just lost his promos over it. I've seen other people reporting this bug, so I assume it's not just my internet connection.

Basically the client freezes at champ select, forcing me to wait out the timer until I'm AFK checked. I have to exit the client before I can go do anything else.