The clock option doesn't work any longer with my files nor with the example 3 file of the ctan distribution of powerdot. The problem arose after an MiKTeX update. Formally the files compiled with the clock option, now the file compiles only if the clock option is omitted. Does anybody know about this problem? Is it a powerdot problem or an xcolor problem? The error message reads:
It is a hyperref problem. In short: powerdot uses transparant (empty color) as background for the clock so that it can take the background slide colors. Hyperref changed the color handling from some private things to xcolor, which does not allow empty colors. Heiko Oberdiek knows about the problem and is working on it. -Hendri.