Same here with the message and I'm on a brand new system:
new macpro, new mavericks, new photoshop CC and havent done a thing yet.
Tried all found solutions:
-300x exit prefs etc
-pushing my belly button
But nothing helps.
I tried a little work in PS (render/save etc) and that all seems to work
2014-02-07 16:23:50.885 sniffer[522:303] invalid display
ContextOffscreen exception caught and ignored.
2014-02-07 16:23:50.886 sniffer[522:303] invalid display
And dont know what to do about it and/or if that causes it. Thank you. & regards
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