It's really sad that Expanium 510 only plays mp3 (and it's not the cheapest one), but a wierd thing is..
If you open the upgrade file as a .txt file, (found on http://www.audio.philips.com/expanium/firmware.asp ), you can see in the bottom that there is ".cda, .mp3, .wma".. yet the player can't play wma files.
If somebody also has that player, can you please check it out!? B)
Thanks!