Mageia insists users must be lowercase only

Only a very minor gripe but having just done my first Mageia install the only issue that stands out is that Mageia insists on usernames being lowercase only.
I know that doing everything in lowercase is very much a Linux thing but even the rather staid CentOS allows mixed case usernames. That lets us keep the same (mixed-case) username that we have in Windows.
I know that doing everything in lowercase is very much a Linux thing but even the rather staid CentOS allows mixed case usernames. That lets us keep the same (mixed-case) username that we have in Windows.