thanks I'll try remounting them. It's a weird thing because it works for a while then suddenly it stops finding the card so it makes sense there is something in how the card is mounted.
My initial though has been to just rename the files in the .FBReader dir and re-install. I have a suspision something in a file is outta whack. It could be related to how the program can sometimes simple not save any config changes.
Anyway, I will give it a shot a bit later tonight and post what happens. Thanks for the suggestion.