we have a ticket open with Microsoft on this DST patch issue and here's what we've been told so far:
* there are two separate CAB files - one for WM2003 & one for WM5 (of course, they couldn't tell us why their file didn't work on both platforms to begin with , like the one in this thread does...)
* just this morning they called and said they are getting ready to release a file that does NOT require the manual steps (of changing timezone back and forth)

maybe their site is down for the CAB files since they are getting ready to release new ones?