The problem is that Windows (XP up to Vista) doesn't support 32bits bitmaps, and they shift properly written bitmapts by 1px. Others applications and OS doesn't (try opening your images with Safari for Windows, you should not see the 1px-shiftage).
The problem is that Windows (XP up to Vista) doesn't support 32bits bitmaps, and they shift properly written bitmapts by 1px. Others applications and OS doesn't (try opening your images with Safari for Windows, you should not see the 1px-shiftage).