I'm developing a project on OS X Lion that is under Git version control. I had these lowercase directories and then later capitalized them (e.g. emailaddresses => EmailAddresses), but Git doesn't seem to recognize the change. It still thinks the directories are lowercase when I run git ls-files and other commands.

Is this harmless, or should I do something else to get Git to pick up on this change?

You can tell git to take account of the case by running

git config core.ignorecase false