That's actually the reason I changed all my main folders to lower case. Another nice thing you can do is change your downloads folder to 'internet' so that tab completion doesn't mix it up with 'documents'.
What are you crazy? They're completely different! You think ASCII code 01100100 is the same as ASCII code 01000100? COME ON!
Seriously though, if Linux would implement a fuzzy search for capitalized and uncapitalized letters that would be pretty cool. Like if you do cd downloads it should be able to pretty easily find that you meant cd Downloads