Re Vista RC1 and sleep mode

Hai, anyone else getting machine crashes if they put RC1 into sleep mode??
When I put mine into sleep mode, front button does not flash on and off as it
should, frantic disc activity, video to monitor stops okay. Then when I try
to wake it up, I either get the @Windows has recovered from a near fatal
crash, or windows did not shut down properly, any one else getting this? I
don't remember having this problem in beta2 and pre-RC1. have sent a report
in of course.
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technogran