We are here and waiting to respond to any first day patch issues you may encounter. If you do encounter any bugs after patching, please post them here for our team to investigate.
Also, you may want to check reddit as well: http://www.reddit.com/r/leagueoflegends/comments/2ty02g/52_patch_bugs_megathread/
There was an issue with Ocean Week Fizz icon being unavailable. It is now fixed and in store!