grouped-table

iPhone sdk will not compile if i use UITableView Group background color

if i use grouped table view or just use this color, i get this compilation error: The document "DetailedView.xib" could not be opened. The operation couldn’t be completed. -[NSCFArray insertObject:atIndex:]: attempt to insert nil. if i use plain tableview it works fine. also i tested on number of xcode installations and on different co...