I think the issue with this is that nobody appears to have found a total, 100% *fix*
There are solutions that work for some devices and/or a limited amount of time. I have tried most of the suggestions here with some success, but always the info has later disappeared again and/or the problem occurs with a different user.
RIM need to sort it out, really. Something just doesn't work properly. Maybe BES 5 will be different.
: Infrastructure Architect, Denver CO