Nah I wouldn't go that far.
When I wrote that module I dealt with the normal program defaults of installing a fresh ib2 install. The default stores a user's style when they register to the default 1
Could be your upgrade from or old ib never did that and your users where set to 0.
I just added a switch if its set to 0 then use forum default. Not a big deal and I will get our code updated