Hello Dean: First of all, the latest version is 2.3 and it is not Beta, so if you're running any Beta version, you need to update to the 2.3. You will have better performance with your 1 gig card, if you format that card, after updating to this version. If you just copy the file onto the card, the file is unindexed, and cannot be marked. If you want to be able to mark and for the most navigation, you will need to go through the Transfer software which will be indexed. You should have no problems setting marks and having them retained in an indexed file that you have sent through the transfer program. Hope that helps. >>> dean92@xxxxxxxxxxxxx 09/27/06 03:38PM >>> Hello Everybody. I jumped back on here to try to get to the bottom of a problem. Does the book Port support the setting, and most particularly, the retention of marks in either unindexed or indexed mp3 files/ I ask because for me, using the latest beta with a 1GB card that shows no other signs of instability, it does not. the marks are set and they work in two unindexed files I tried it on in a subfolder, but as soon as I navigate away from those files and return, the marks no longer function. the manual does not address the question. Is this the expected result? will it be different if I use the transfer software and have the files indexed? As I think about it, I know of at least one occasion where numerous marks in a text file were also lost on this same unit running the same firmware. I wish marks worked! Dean Pamela Rader, TECHNICAL SUPPORT American Printing House For The Blind 1839 Frankfort Ave. Louisville, KY 40206 PHONE: 1-800-223-1839, Ext. 307