Has anyone else found that there is a maximum limit (5800 for me) on the number of tracks in the library? I've got rather large library (>6000 tracks of mostly MP3s) that I've copied over to my microsd card. I first noticed that when browsing by category, I wasn't able to find certain artists but I can see all of the tracks when browsing by folders. Just in case it was a tagging issue, I double checked all the files and resync'd using MediaMonkey. After the second transfer, I'm still limited to 5800, but a different subset of tracks is listed.
I'm sure once I finish re-ripping my CDs to FLAC I won't be able to fit the entire library on the X5, even if I go crazy and pick up 2x 128GB cards. But, still a strange number to be limited to.