I had a glitch when entering the Cache DB location. What I wanted was - /media/mmc2/Maps/YahooStreet
What I got was - /Media/mmc2/Maps/YahooStreet, which (obiviously) won't work.

Somehow the text entry field was very persistent about setting the "M" as uppercase. I was able to work around this by entering /D/media/mmc2/Maps/YahooStreet, and then coming back to edit the entry and deleting the "/D", and the "media" stayed with a lowercase "m".

I posted this in the newbie forum, because, this could just as easily be a problem with me, but the behavior seemed a little odd, so I thought I would post it.