Amarok 1.4.9.1 (from Ubuntu Hardy repos, with KDE 3.5.9) is not detecting my MTP device, Creative Zen MicroPhoto. It works with Rhythmbox and gnomad2. Also, mtp-detect sees it. Here is some of the output of mtp-detect:

Detect: Successfully connected 1 devices
USB low-level info:
  Using kernel interface "usbfs"
  bcdUSB: 512
  bDeviceClass: 255
  bDeviceSubClass: 0
  bDeviceProtocol: 0
  idVendor: 041e
  idProduct: 413c
  IN endpoint maxpacket: 512 bytes
  OUT endpoint maxpacket: 512 bytes
  Device flags: 0x00000001
Device info:
  Manufacturer: Creative Technology Ltd
  Model: Creative Zen MicroPhoto
  Device version: 1.20.01_0.00.65
  Serial number: 01052(removed cause I'm paranoid)3931C
  Vendor extension ID: 0x00000006
  Vendor extension description: microsoft.com: 1.0;microsoft.com/WMPPD:
10.0;microsoft.com/WMDRMPD: 10.1;
   Detected object size: 32 bits

I ran mtp-detect as the same user I run amarok as. I try to autodetect the device, and it gives me the generic message:

No new media devices were found. If you feel this is an error, ensure that the DBUS and HAL daemons are running and KDE was built with support for them. You can test this by running "dcop kded mediamanager fullList" in a Konsole window.

I also started to attempt to compile from source. I ended up having to get a new version of kdelibs. That wouldn't compile unless I got Qt4.4. It was wayyy too complicated, so I gave up.