True, I just lack the money to invest into it.http://helpx.adobe.com/x-productkb/global/mac-os-mavericks-compatability.html
Don't appear to be any major issues, although you should really start thinking about upping to CS6 as it's likely going to be the standard for holdouts for a while and you'll see some pretty good updates.
Haven't run into any issues in Maya 2013 but I've been switching over to Cinema for more and more stuff so I can't really say I've run it through its paces.
I'm not too keen on the interface either, but maybe I'd get used to it.
I'll have to investigate further when it comes to Maya then.