We haven't seen or heard of that before, but it does sound like an issue with PsExec. One search result for the error suggests deleting the psexecsvc.exe on the remote system in case there is a version mismatch. You might try posting details on the SysInternals PsTools forum to see if they can shed any light on it.
http://www.kinook.com/Forum/showthre...?threadid=3044