Acknowledging the "data corruption bug" that's been ravaging Windows Home Servers since Christmas, Microsoft today warned users NOT to:
• "Use applications to directly edit or change files stored on Windows Home Server"
• "Use media management programs, such as Windows Media Player, to import files to the Windows Home Server"
• "Redirect applications to access files stored in the shared folders"
Instead, users are instructed to move files to and from the server only by hand, using Windows Explorer or a command line tool. Promise of a fix was cautiously optimistic, but not exactly speedy:

The issue can now be reliably reproduced and a fix is in development. Once the patch has passed internal quality bars, external participants will be asked to help test the fix. Our current plan is to release beta test versions of a fix over the next few months, with a final version currently estimated for June 2008.
Some of you will probably want to get on board with that beta test. In the meantime, let's all heed those warnings. [Updated Windows Knowledge Base Support Page ; Windows Home Server Official Blog ]