[k9reeder]

1. That should be working, sounds like you're doing it right. By the way, just as an aside, the ALP, mine at least, automatically re-opens any book I was reading to the last page I was on - it remembers, no bookmark necessary. I assume yours works the same way, right? Anyway, are you experiencing the same bookmarking problem with all books, and all formats?

2. I don't have an answer, but just to eliminate a possibility, have you tested using a different SD card, different brand, different size? I had similar problems with what I thought was a faulty mp3 player, but turned out the player just didn't seem to like the brand of card I had been using. (The bum card worked just fine in my PC's card reader too, just like your experience.)