But how many programmers are even aware of the fact Unicode has both an Uppercase and Titlecase mapping? Let alone that they can do different things! I routine

But how many programmers are even aware of the fact Unicode has both an Uppercase and Titlecase mapping? Let alone that they can do different things! I routinely see code that treats titlecase as “set individual character in this Unicode string to its upper case equivalent”... It wouldn’t surprise me at all to find out this kind of titlecase vs uppercase mistake is a very widespread issue.