High CPU and log spamming

[shad0wca7]

I'm running the latest 2.4 beta 2. Overall working pretty well but for some reason today I'm getting high CPU and a lot of spam coming through in the syslog like this:

WindowServer[234] <Error>: allocate_backing_surface : IOAccelCreateSurface = e00002c7
--- last message repeated 1 time ---
WindowServer[234] <Critical>: *** LOG MESSAGE QUOTA EXCEEDED - SOME MESSAGES FROM THIS PROCESS HAVE BEEN DISCARDED ***
WindowServer[234] <Error>: allocate_backing_surface : IOAccelCreateSurface = e00002c7
--- last message repeated 6 times ---
WindowServer[234] <Critical>: *** LOG MESSAGE QUOTA EXCEEDED - SOME MESSAGES FROM THIS PROCESS HAVE BEEN DISCARDED ***
WindowServer[234] <Error>: allocate_backing_surface : IOAccelCreateSurface = e00002c7
WindowServer[234] <Critical>: *** LOG MESSAGE QUOTA EXCEEDED - SOME MESSAGES FROM THIS PROCESS HAVE BEEN DISCARDED ***
WindowServer[234] <Error>: allocate_backing_surface : IOAccelCreateSurface = e00002c7
--- last message repeated 1 time ---
WindowServer[234] <Critical>: *** LOG MESSAGE QUOTA EXCEEDED - SOME MESSAGES FROM THIS PROCESS HAVE BEEN DISCARDED ***

Anyone know what might be going on?