I use OperaMini day in and day out as my prefered browser and love the experience. Well, except for one thing, the frequent network selection dialog boxes. Some say it is an S60 feature but in my opinion this is just a big bug in the software. Anyway, Constantine from Intomobile now provided a great solution to the problem: In the S60 application manager, it is possible to define the behavior for each Java program. To get rid of the stupid dialog boxes, open the application manager, select OperaMini, select Open, and then set 'Network Access' to 'Ask first time'. Afterwards, no more stupid dialog boxes. Thanks, Constantine!
The only drawback seems to be that one has to select a default access point when the setting is changed. This makes it difficult to use OperaMini over the Wifi network at home when the default access point has been set to the cellular network. Well, I guess you can't have it all.