I updated my Oregon 450 through WebUpdater today. The text files went fine, but the time zone map gave the same error message as lolypop000 experienced.
Edit:
This is the error message:
Note that the Time Zone Map offered via WebUpdater is version 11.00, not version 13.00:
Updated the Oregon 450 via Garmin Express. Update to version 13.00 went without any problem.
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