I downloaded the Sample applications from Nokia dev site, loaded both jar and jad files onto my 6085 via bluetooth, and when I tried to run them I see "Invalid application, delete?" notice. I tried "SVGProject", and others.
Yes, I did read the "Why doesn't my Midlet Run" article.
Yes, I did try emptying the inbox, re-sending the JAD and JAR, and installing again.
Also, since the code is from Nokia, I assume it's been built correctly.
Anything else I can try?