I don't think it's up to the roll20 server -- unless that changed this past update. When using the script you're referring to, the fonts render properly for me because I have all the fonts it is looking for locally on my own iMac. However, any computer that doesn't have some of the fonts, all of which are Windows based computers, do not render anything -- they receive blank boxes. They may render properly to you, which means you likely have the fonts already on your system. What Aaron is referring to, is a script of his own, not the one you are referring to. In either case, as he pointed out in his last sentence, the look of a given font is dependent upon whether someone has that font on their own computer (client side). If it isn't, then they will see a box outline for what should be there, but nothing special beyond that.