Most CPanels work independantly of the MySQL password; in fact, they generally utilize your user password on the maching (such as for ftp or ssh access); mysql is a seperate service with its own user system (as it has a very strict permission system).
And as NT said best, Windows does not care about cAsE SensATIvitY, which can be horrid with usernames and passwords (the option to be CaSe SENsITIve is a good security option as well as you can change a simple string into a useful/secure password due to how you EnTEr it).
