Slow Storyboard edition in XCode 4.2
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Using XCode 4.2 to edit a simple App with a TabViewController and 5 tabs. I am just starting the app so there are not too many components in each.

However, just switching from viewing code to view the Storyboard in XCode takes about 1 minute. Any change is that slow... like it is rebuilding the internal hierarchy of all components everytime I touch something.

Have anybody else experienced this? any advise. 

Thanks. 