My "Time Machine" external drive was only about 1/4 full according to the "get info" panel for that disk. Then, I installed Fusion 1.1 with Win-XP, Home Edition yesterday afternoon. This afternoon while the computer was idle a small window appeared on the screen with a message stating that Time Machine needed additional space and had deleted everything prior to yesterday ! ! ! I checked the "get info" for that drive and found that only 40GB of 250GB are used. This is not only puzzling; it is disturbing. Could Fusion 1.1 with Windows have caused this? I only allocated 25GB for the Windows VM. The "get info" panel today (after the 25GB was allocated to the VM) for my primary hard drive indicates that I have used only 65GB of the 300GB available on this 24" iMac running OSX 10.5.1. Is this a malfunction of TimeMachine? Hope someone can provide some insight. Thanks for your comments.