I have updated to version 3.40 on my Oregon 550, and version 3.0.2 Basecamp on the computer. Street names are working again in version 3.40! The current versions seem to be working well on my systems.
Yesterday I made a seven mile kayak trip around Smith Lake in Portland, Or. I have several custom maps of the Columbia River which also cover the lake area. While the number of tiles in the custom maps exceeds the 100 total limit somewhat, they still display without error on both the Oregon 550 and Basecamp. I am not experiencing significant slowness in Basecamp on this Win7 machine.
The tracks and waypoints work fine with the custom maps; both on the Oregon 550 and when the data is viewed in Basecamp.
I also imported the GPSr data into Google Earth, where the tracks displayed just fine. My waypoints did not display in Google Earth, however, which may be due to some setting issue I have that needs to be changed. They were showing up in the sidebar list of myplaces, though.
So, all told, thanks for the updates, Garmin!
-Dale-