The update to the company's operating system designed to function as a media server in the home was originally slated to include features such as backing up of shared folders, Vista x64 support, more efficient power consumption and improved performance. However, the release was delayed so Microsoft could figure out, and a include a fix for, the data corruption problem.

The issue occurred when certain programs were used to edit or transfer files stored on a Windows Home Server-based computer that has more than one hard drive. Applications that caused the corruption included: Windows Vista Photo Gallery, Windows Live Photo Gallery, Office OneNote 2003 and 2007, Office Outlook 2007, Money 2007, SyncToy 2.0 Beta, Intuit's QuickBooks, and uTorrent.

Why did it take so long for Microsoft to resolve the bug? After isolating the issue, the company was forced to completely rewrite the storage subsystem for Windows Home Server. A beta release of Power Pack 1, which Microsoft hoped would "prove we fixed the bug," was released last month to testers to make sure nothing was missed.

View source : here