[OT] CS5.x / scratch file / Apple system updates?

Valued Contributor II

Recently we've had a rash of complaints about CS5 users launching photoshop and getting the infamous scratch disk error. It seems to be only the 10.6.x systems (not the 10.7.x). Honestly it all seemed to start when I re-activated the apple SUS, which doens't handle adobe patches (obviously). So i guess my question is if there are any packages or updates that may cause that behavior? Maybe some way I can narrow down whats happening?

I'm band-aiding the problem by granting read/write permissions on the /private/var and /private/tmp folders.