Photoshop CS2 not saving properly

I'm using Photoshop CS2 on XP and a few times the program will go through the motions of saving however when I open the file later, a large portion of my work is missing. It has deleted selections and layers, leaving one layer from the middle of the project. The thing is that it must have saved at some point in order to have the layer it left but it's almost like it decided on its own to purge the image after the save process.I usually start w/ a .jpg and save it as .tif once I've started re working it. The projects have not been related and stemmed from different sources.

I almost always save a separate copy under a different name and open it immediately to make sure all is well.

You are saving locally, not toi a server or removable device, correct? That can cause file corruption.

Aside from that I would suspect cables, hard drive or RAM as the culprit.

Have you trashed/reset Preferences as per the FAQs?

I am saving to a server.But there are 5 other people/machines that are doing the same work I am, on the same server and only one has had this problem as well.

Russian roulette. You got the chamber with the bullet.

< http://kb.adobe.com/selfservice/viewContent.do?externalId=33 2534&sliceId=2>

When you save and open files across a network or from removable media, many variables affect application performance. Consequently, some problems (for example, damaged files, denied access, or slow performance) occur more frequently when you work across a network or from removable media than when you work from a local hard disk. In these situations, Adobe Photoshop may return one of the following error messages:

-- "Could not complete this operation because this file is in an unknown format."

-- "Could not complete the request because the file is locked."

-- "Could not save because of a disk error."

-- "This document has been damaged by disk error. The most likely cause of this error is a defective disk drive, SCSI, or SCSI termination. Pixels may be damaged. Open anyway?" (When you click OK, Photoshop may not open the file.)

Note: Problems using Photoshop files across a network or from removable media may be intermittent or delayed.

Adobe Technical Support only supports using Photoshop CS2 on a local hard disk because of the difficulty of re-creating or accurately identifying network- and peripheral-configuration problems. Adobe Technical Support does, however, support using Photoshop CS2 with Adobe Version Cue, a file version management feature in Adobe Creative Suite 2.0 that enables you to work with files in Version Cue workspaces on other computers. (See "Recommended workflow" below for more information about Version Cue.)