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Are you serving the same page for both /MBA and /mba?  You should set up a 301 redirect from one to the other. In Analytics, you can set a custom filter to make your URLs case insensitive, but I don't believe that'll fix the data currently in your account, it'll only fix them going forward.  That process is outlined here: http://support.google.com/googleanalytics/bin/answer.py?hl=en&answer=90397. My URLs are all lowercased so I can't actually find an example in my account to test, but when I do an advenced filter and select Include Page with the match type of "Matching RegExp" and try URLs with uppercase characters, Analytics appears to be making the query case insensitive.  So you can try that as well. If the prior paragraph didn't work for you, you can do this on a URL by URL basis, by doing an advanced search by regular expression and substituting in "[M|m][B|b][A|a]" for "mba".

Classic.  Well maybe he shouldn't change anything if he is currently ranked #3, but I assume that is due to the strength of his domain, stupid.com. All of this talk about bacon reminded me of a couple of fellows here in Seattle who come out with a new bacon product every year, and to promote they also come out with some type of bacon art. May I present to you, Bacon Kevin Bacon: Bacon Kevin Bacon

301 redirects still pass link juice, just not quite all of it. If the content of the pages remains the same, you should still be fine, you might see a slight slip but not much.