[Pharo-project] image freezes when setting time "back"

Hi I have had the following experience. I'm running Pharo 1.3 on a Linux box where the time is set on start up using ntp. The hardware clock is set to the local time (because I'm dual booting). When there is no network connection during booting the system the clock is two hours "ahead" until I get network connection and set the time using ntp. When a Pharo image is running during this the UI freezes and doesn't react anymore. Does anybody else observe this? Is this a known limitation? Sorry if this message got sent twice. I had some trouble with the mailing list. Cheers Philippe