Photoshop CS5 not actually saving files to SMB shares

Question

Since upgrading to OS X 10.6.6 (and still in 10.6.7) Photoshop CS5 will not reliably save documents to SMB shares on my file server. When I "Save As" a new document, Photoshop goes through all the motions of saving the file. It seems to complete successfully. No error messages. The asterix in the documents title bar disappears as if the file saved. If you command-click on the document's title bar icon it will display the file path properly, as if the file was properly saved and exists. If, however, you go to the folder on the server where the document was supposedly saved using the Finder (or on a Windows machine in the Windows Explorer) the file does not exist. It was never actually saved.
This seems to happen mostly with larger files (over, say, 100MB in size) as oppsed to smaller files. If I change my connection to the server to AFP as opposed to SMB(CIFS) the file saves correctly without any problems.
Has anybody else ever encountered this problem? I have only noticed this issue since upgrading past OS X 10.6.5.
Thanks!

Answer 1

This is the boilerplate text often used in connection to saving to a network (please NOTE the part where it explains that normally, it does work, but that it is impossible to troubleshoot someone else's network remotely, and that's why it's not supported by Adobe):
If you are opening files over a network or saving them to a network server, please cease and desist immediately in the event you are currently experiencing problems with one or more files. Working across a network is not supported.
See: 
http://kb2.adobe.com/cps/406/kb406793.html
  Copy the CLOSED file from your server to your local hard disk, work on it, save it again to your local hard disk, close it, and copy the closed file back to the server.
     Of course, the fact that Adobe does not support working across a network does not necessarily mean it won't work.   It should.
    Adobe's position is that there are too many variables in a network environment for them to guarantee that everything will work correctly in every network, especially given the fact that if something does not work properly, it's probably the network's fault, and Adobe has no way of troubleshooting your network.
  If you can't work locally, you are on your own, and if something happens, you're on your own. If you must work from a server, make sure your network administrator is a competent professional.
When problems arise, a lot of valuable work can be lost.