The ™ (TM) symbol is not validating. It's charset=ISO-8859-1 compliant but not Standard General Mark-Up Language. What is the SGML character for the TradeMark symbol? In fact, anyone have a reference page for them all? Thanks.
Numeric codes between 128 and 255 inclusive are platform-specific: Macs will probably display different characters. That's why entities like ä and é were created. For the trademark symbol, use ™ or ™ -- although some older browsers might not recognise them.