Changing username capitalization?

[Bo Berglund]

I need to have the same username on my linux machine as on Win7 for
connectivity purposes.
I installed linux with all lowercase letters in my username, which is
what I also did on my Windows7 main machine.
But the auth log for ssh access from Windows says that the user is
nonexisting and when I look closer the supplied username starts with a
capital letter!
Obviously Microsoft decided to change the username on installation of
Win7 by capitalizing what was really entered by me and now the
connectivity is broken...

Since I don't think I can safely change the username on Windows I need
to do it in linux instead.
Is there some way to capitalize my username in linux?

Note: 
I have only this single account on linux and it is being used as a web
development test machine where I want to use rsync via ssh to update
the web files before testing.


-- 
Bo Berglund
Developer in Sweden