I did some further testing on my regular system (Packard Bell netbook, W7 starter/32 bits, Cakewalk UA-1G, BS beta). Everything seems to work fine. Tried both 48 kHz and 96 kHz, both 24 bits and everything workes as expected. Same comment as ogs, Cakewalk/Roland advises to unplug/plugin the device after changing setting, this caused VS to hang but that's to be expected. A restart of VS cured that. Unplugging/plugging in of devices is not regular practice so I'm not surprised it causes some inconvenience.
BTW, the labeling of inputs of Asio device (IN and IN(R) could be a bit more unambiguous. I assume it means left and right respectively. Perhaps something for the final version.