I recently had someone attempt to download a MIDP 1.0 game midlet (no API extensions) from our web site to test, but they get an "Invalid Descriptor" error. We have no problems with Nokia 3510i, 3410 and 3650 phones. The phone that the user is using is a Samsung VGA1000. The JAD file looks as follows:

MIDlet-1: Addiction, /icons/Addiction.png, Addiction
MIDlet-Description: Highly addictive arcade game
MIDlet-Jar-Size: 14374
MIDlet-Jar-URL: addiction.jar
MIDlet-Name: Addiction
MIDlet-Vendor: Pocketeers.
MIDlet-Version: 1.0
Manifest-Version: 1.0
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0

Any ideas much appeciated