I have an application with a UITabBar. I have implemented a Photo Gallery using Three20. Everything is "working fine" except that when I switch to the Photo Gallery, the TabBar dissappears.
I am guessing I am going to have to go into the Three20 code and make some sort of modifications.
Any idea if my assumption is correct and / or what changes I should be looking to make?
yes your assumption is correct, and i would look to change in the Three20UI project, under Photos>Thumbs Controller> TTThumbsViewController.m in the initializers (specifically the one you use), change self.hidesBottomBarWhenPushed = YES to NO and hope that does it :).
Good luck!
In answer to the addition question in the previous comment -
For the NavBar colour you need to set navigationBarTintColor, and for opaque/translucent you can set navigationBarStyle. Both of these are properties of the TTBaseViewController that itself is a subclass of UIViewController.