Only noticed since upgrading to Yosemite – CC apps crash often, most notably when importing or opening dialog boxes.
The nice side effect is that auto-backup system keeps dumping useless garbage into hidden folders, constantly eating up HDD space, which I then need to restart to rid myself of.
How did you "upgrade" to Yosemite? Adobe apps often respond badly to in-place upgrades.
Peter is correct. In place O/S upgrades are nothing but a crapshoot. I cannot possibly preach clean installs loudly enough.
I did my MacBook Air that way and everything runs like a dream.
Did you recover from a Time Machine or other backup for data, or do you do a clean slate? I have a lot of synced data (Dropbox) that I don't want to have to re-sync.