I have been having the same problem, thought it might have been a problem with my new GPS, so restored manufactures defaults. No results. Thought it might have been to many waypoints on my gps. so deleted all the old ones. didn't work (annoyed now as I deleted all the ones that were correct). tried redowloading the plug in (on dial up!!!) didn't work.
At least I know now that it just is't me.
Hopefully we will hear soon what the problem is.
Thanks