If you are not keeping up-to-date with your SharePoint patches, chances are you are behind the times in more ways than one. Have you checked the timestamp on a recently created item? Is it out by an hour?
Well, there is no time like the present (plus or minus 1 hour) to start patching. If you need information on daylight savings patches for WSS you can find them at http://support.microsoft.com/gp/dst_prodlist#WSS3