I used to distribute my own version of Emergency Contact List to some of the blackberries in my environment. With the 8310 model this doesn't fly anymore. So my guess is as of 4.2.2 it won't install OTA. With 8800, 8100, 7100 and 7130 it works fine. A local install with desktop manager goes OK as well.
To avoid walking as much as possible
I now provide a http link. Still it keeps me puzzled a bit. Any ideas?