[thelist] case sensitive?

[Flavia Tarzwell (FayeC)]

Ok....having a brain melt here......
Is there a way to define case sensitivity in code? I mean....if someone 
registers a username with capital letters (data written to an Access db 
- site hosted on a Windows server) and then tries to log in with caps 
off....they can't get in...
I thought case sensitivity was determined by the server (UNIX being case 
sensitive and Windows not...)
What can I do to make it so that case sensitivity isn't an issue...

Thank you

FayeC