Gerdish:

Yes. I am in the same boat.
I have tried several check_interval values but no luck.

Cfh11:

I have it set to always ask.
The problem is if i turn my internet connection on for instance to check my mail or a weather report it triggers the update check and 5Mb unwanted download.
It doesn't happen always but quite often.
Nokia should have thought about it.
A simple option in appmanager settings would be enough.