Constant corruption of User/Library/Cache files
In the last year, I've been dealing with a constant rash of intermittant user cache file/folders corruptions. Users reside on a OD Snow Leopard server (version 10.6.8), while clients are Intel (Westmere) PowerMac's running OSX 10.7.5. Problem is exhibited by client looging to his/her account. Machine loads all the way to the desktop, but when an app is selected, machine begins to endlessly beachball. Purging user's network stored Library/Cache files/folder on the the server side allows machine to work flawlessly for as short a time as 2 days up to serveral months, and not always the same user or same machine, however it does seem more prevailent with users that are moving from machine to machine. All local user's resident to the local machine, work fine with no corruption problems, only network users residing on the server.
There isn't any operation miss use I can determine. All machines are of the same family, same OS version, same app version, basically all are uniformally setup. Loop pinging server, shows no lose of data to/from server, and server has plenty of storage headroom, but there is obviously data corruption when local machine uploads back to server prior to shutdown. Network is over gigabit ethernet, to Intel Xserve of which a 30 terabyte RAID (6) stores Home folders. I've verified the RAID integrity is best I can, as RAID also serves project files, but I have not seen any shared file corruption.
As to which exact cache file is problematic, it would appear to be random, as I've seen Metadata, MS Office, spacific app's, Safari be the culprit. I've spent several hours with Apple Tech Support, and done and exhaustive search online, but no joy. Any recommendation would be welcomed. Thanks in advance.
Mac Pro (Mid 2010), Mac OS X (10.7.3), 3.33G Intel Westmere