Article: OS X 10.9.3 Update
Once I updated I couldn't boot anymore, I got always stuck at some sound assertion message on boot screen, tried to boot while ignoring cache and got kernel panic at boot screen, so booted into Lion and repaired permissions on mavericks HD, but it didn't help, then reinstalled audio kext from multibeast, still it didn't help, so went ahead and completely reinstalled multibeast 6.1 from lion onto mavericks, and chose imac definition 14.2, after that I could successfully boot into mavericks.
Before my definition was mac pro 6, my guess is, that it might somehow got messed up after update, I got that definition from kext wizard long time ago, so I guess it was a definition problem.
Maybe this will help someone with similar problem.
No problems at all after that, sound works after sleep, but as I've said I'm using multibeast 6.1.