This blogger says that she is having problems with her Comodo Time Machine.
http://www.lockergnome.com/shadowmyth/2010/04/07/nightmares-of-comodo-time-machine/
She probably has not reported the problems on the forums. As of now I do not have any way to get hold of her to ask her further questions, but I thought you would want to know about her issues. Wish I could be more helpful.
-Katharine