Though it has been mentioned, I must reiterate to newbie Fuze people like myself that files you put on your Fuze during MTP file transfer mode will not show up if you switch to MSC mode and vice versa. For ease of use, I recommend as soon as you get your player to keep it on MSC mode.
Also I am currently using a Kingston micro SDHC 8 gig class 4 card and it is pretty slow in transfer speeds though this is not a problem for music file playback. But I did read over on different forums how this particular card does not like playing back video files in the Fuze. Although I have no idea who would want to watch video files on such a small screened DAP anyways.
Also, has anyone else noticed the "sound skipping" effect when a headphone jack is not properly seated in the headphone out? I nearly crapped a brick when it started to happen but then figured that that was the culprit. Though my Klipsch Image X10 sounds wonderful with the Fuze, I have to have the headphone jack angled in certain positions or even have it just a millimeter pulled out to not get that effect at all. Weird problem and a weird solution but the headphone out has a tight grip and when the headphone jack is pulled out just a smidge it isn't loose at all.