Re-test when beta2 arrives, is the best advice I can think of at the moment.
About the more generic issue--have you tried the public groups for MCE?
--
FAQ for Microsoft Antispyware:
http://www.geocities.com/marfer_mvp/FAQ_MSantispy.htm
"ace" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Under Windows MCE 2005, I have noticed that after having installed
> Antispyware beta, my computer would no longer switch to S3 mode when being
> unused as configured into power options applet from the configuration
> pannel. Uninstalling Antispyware solves the issue.
>
> This is an important issue, since MCE 2005 machines have to be available
> very quickly when you want to listen to music or watch tv, thus people
> tend to leave them powered up all day but have them fall to S3 mode when
> unused.
>
> About S3 mode, I want to give my special "foolish programmer award" to the
> genius at Microsoft who has decided to have my windows MCE automatically
> wake up every night from S3 mode at 3:47 AM in order to retreive the
> content of the Electronic Program Guide. As I often forget to shut down
> completely my computer at night (as it is in S3 mode, it makes itself
> being forgotten), this wakes me up very often as I sleep in the room next
> to my living room. And of course as an authentic genius, the guy has
> somewhat cyphered the registry key that sets wakeup time in order to make
> sure that you can't modify it !
>