I, too, am seeing the "Generic Error" when attempting to download a route. However, it only happens for me when I am connected to the internet through my cell phone. If I am on my WLAN connection, downloading routes works just fine.

According to the "Help" menu I am using version 2.5.1, but according to the Application manager I am using version 2.5.2-os2008.

I have checked the results of the mount command and the mmc cards are mounted and in 'rw' mode. I also do not suspect memory corruption because I have other data which I can access with no problems, some of which is the maps that I can view with maemo-mapper.