Here's a quick demo - am I missing something? mobilesdk 1.2.0
var win = Titanium.UI.createWindow({ backgroundColor:'#fff', barColor: '#660000', tabBarHidden:true }); // create tab group to manage multiple windows var tabGroup = Titanium.UI.createTabGroup(); var tab = Titanium.UI.createTab({ title:'Bug Demo', window:win }); tabGroup.addTab(tab); tabGroup.open(); var tc = Ti.UI.createButtonBar({ labels: [{ title: 'disabled', enabled: false },{ title: 'enabled', enabled: true }], backgroundColor: '#660000' }); win.rightNavButton = tc;Update: it turns out that setting the style of the buttonbar to Ti.UI.iPhone.SystemButtonStyle.BAR is what makes this work. So I guess it's iPhone only (of course, the buttonbar usually lives in the iPhone-only title bar or iPhone-only Toolbar, so maybe it's OK that way).
Thanks for giving me a working example to compare to, Clint.