Fedora 18 Alpha TC6 DVD - Select "Português (Brasil)" - Continue, I Accept my fate - Continue (Network screen) - Click Localization -> Date & Time - Blank screen (the mouse pointer still work) I could reproduce this three times. Apparently the bug doesn't happen using English instead. anaconda.log and X.log attached.
Created attachment 610310 [details] anaconda.log
Created attachment 610311 [details] X.log
Is this a live install?
No, it's the x86-64 DVD install media.
Okay, well I think you're still running into a problem we're also seeing on live installs. It's got all the same symptoms, at least. *** This bug has been marked as a duplicate of bug 854688 ***