The Span100 exercise site was built before OSX, and HotPot in those days had to detect when a page was running on the Mac and change the character handling because Macs had their own encoding before OSX. That was screwing up accented characters on modern Macs, so we've used Transformer to comment out the Mac platform detection in all the exercises. Note: this site really could use a rebuild with the 6.3 version of HotPot, but that would take significant time because it uses customized source files.