Default timezone is wrong!

On one computer in our development shop, java's notion of time is one hour behind. It seems that Java gets the wrong default timezone for that machine, and I can't for the life of me figure out why.
All machines are running java 1.4.2_03 on WinXP SP1 with all latest updates as of 5/25/04. In the Windows Date/Time control panel on all machines, timezone is set to "(GMT-0:800) Pacific Time (US & Canada); Tijuana" and the "Automatically Adjust for Daylight Savings Time" box is checked. It is May May 26, so daylight savings time is in effect. The Windows clock in the lower right corner reads the same time on all machines.
Running the code:
TimeZone tz = TimeZone.getDefault();
System.out.println("the default timezone is " + tz.getDisplayName(true, TimeZone.LONG));
System.out.println("the default timezone ID is " + tz.getID());
System.out.println("useDaylightTime = " + tz.useDaylightTime());On the "bad" machine produces:
the default timezone is GMT-08:00
the default timezone ID is GMT-08:00
useDaylightTime = falseAll other machines produce
the default timezone is Pacific Daylight Time
the default timezone ID is America/Los_Angeles
useDaylightTime = trueWhy is the timezone on the "bad" machine "GMT-08:00" instead of "America/LosAngeles"?
(I've also verified that the default Locale on all machines is the same).
Any help would be appreciated.

Tried setting timezone to Tokyo (which does not observer daylight savings time), then back to Pacific. Problem still present. Tried setting to Mountian time zine (which does observer daylight saving) and back - problem still present.
One interesting thing: on the "bad" machine, java always shows the timezone in the generic GMT +/- offset format. On a good machine, java is able to translate into the "America/Los_Angeles" format. Just to check, I explicly set the timezone on the bad machine (with TimeZone.setDefault(TimeZone.getTimeZone("America/Los_Angeles")); and then the bad machine does display the correct time and timezone.
So, somehow it is not able to use what it gets back from Windows to correctly look up the "America/Los_Angeles" style timezone, so it falls back to the GMT+-offset format.
I verified that the java installations are identical on all machines (I zipped up the one on the bad machine, and did a file-by-file byte compare to one on a good machine).

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