Can anyone explain the difference between updates done via myDashboard through a browser and the ones done using WebUpdater?
What I have gathered is that using myDashboard updates all voices/text if you want them or not, while WebUpdater lets you choose which ones you want.

Try These
These previous discussions should help:
Tampa, FL - Garmin nüvi 660 (Software Ver 4.90), 2011.20 CN NA NT maps | Magellan Meridian Gold
Only three words for
Only three words for Dashboard.Don't do it.
Charlie. Nuvi 265 wt
LOL !
Only three words for Dashboard.Don't do it.
Remember when we used to say the same thing about Webupdater?
Nuvi 350, 780, 1490T, 3970T and TomTom 540s
Yes on webupdater.I tried
Yes on webupdater.I tried Dashboard thinking I had a update.After taking a while to download I found no update .I had removed files I didn't need or use in my gps.It put them all back.To me it is like a reset.All or nothing.
Charlie. Nuvi 265 wt