I guess this leads to the obvious question...
Why are you editing files that aren't local? Surely it makes sense to copy them to your local drive, work on them and then copy them back over the network.
Leaving files open over the network means that you've got no way back if a corruption/crash happens.
Uhh... because you don't always work at the same computer?
I use two PCs and an iMac for production and I keep all files on a shared network drive which is backed up daily. For heaven's sake, there's about 50 million designers doing the same thing as we speak, that's how people work. Adobe really needs to get their heads out of their rear ends if they're seriously not supporting saving over the network, it's 2008 not 1988.
I
used to work locally and copy to shared storage later, but keeping everything in sync was a time- and energy consuming nightmare so I switched to working directly against the network a few years ago. It's been working like a dream as long as I was on PC only, and on the iMac up until now, but leave it to Apple and their 'bubble boy' OS to screw things up with every damn update...
Anyway, kithands, thanks for the heads up, phew. Luckily I didn't lose any work today, I had planned to work on some graphics but things got in the way.