LoL Crazy Glitches after interface Mini-Update

I haven't seen any recent posts touching on this, so I figured I'd post and see if anyone else is experiencing the same issues.

Yesterday, after downloading the mini-update (interface update) my League in-game client has been going haywire. Issues include:

-No sound exclusive to in-gameplay -Erratic Ping (60-68 while watching other players load; when the last player to load in reaches 99% [and there has always been a player who - while everyone else is at 100% - idles at 2% until other 9 players load in] ping jumps to 260) -When every spawns in, ping idles at 320 and frames per second drop to 04; -Alt+Tabbing freezes game for 7 minutes.

While I'm sure my system may be to blame for all of these things, I know for certain that the update has been the only differentiating factor. Prior to the update everything was running as smooth as ever.

Not sure which interface or part of the game was updated, but it is causing a serious gamebreaking experience for me.