This version of Timekeeper removes support for Windows XP themes and adds explicit support for Windows 7 and later (including 8 and 8.1). (This eliminates the compatibility warning on Windows 7 and later.) There’s a known issue with the new translucency Windows uses on the taskbar. Counterintuitively, if you disable Timekeeper’s transparent background and use a black background instead, it should be virtually transparent. If you use a color for the background, it will take on that hue (and will be translucent rather than solid).