Most popular submissions in 'Usability' are 'Rejected' of all time
Everytime you modify an image using "Edit" in Windows Live Photo Gallery you cannot save its changes. (Affects Windows XP only as far as I can tell)
You can rotate the image though but you cannot modify Saturation, crop the image, change (more...)
Note: Affects Windows XP only as far as I can tell!
Wave 4 no longer works on Windows XP.