I have this problem with nokia n80:
when I try to instal one of our applications it stops in about 70% displaying some problems with certificate. (it doesn't matter whether it's from a .jar or .jad file, OTA or from BT)
I have noticed that when I change one letter in the midlet vendor everything is fine. So i guess someone had to block this vendor during my absence. So my question is how do I unlock it. I can't seem to find it anywhere, phone reset didn't help either.
Cheers and thanks for any help
(and sorry for my English - not being my native language)