Xcode 4.5 corrupting XIBs?

i am using the new xcode 4.5, i have this lines of code on some view controller:

DiscoverCell* cell=[table dequeueReusableCellWithIdentifier:@"DiscoverCell"];
if(cell==nil){
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DiscoverCell" 
                                                 owner:self 
                                               options:nil];
    cell = [nib objectAtIndex:0];
} 

when i run the app its throwing: Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'The NIB data is invalid.' on the LoadNib line, what is that? does this xcode is some apple garbage?

I had this same issue and fixed it by unchecking the 'Use Autolayout' checkbox on the Document Inspector pane in Utilities.

Uncheck the "use Autolayout" highlighted in the below image. Xcode 4.5 enables this property by default for the new nib files you add into your project. Unchecking the autolayout check box solved the problem

I just had this problem and tracked it down to a UIButton that had the Title field set to Attributed in the Attributes Inspector. Changing this to Plain fixed the problem. If I remember correctly I added this button in the last version of Xcode and had trouble with it then also.