Frederico,
< is the beginning character of an HTML command, so the browser is eating it when it finds a non blank character after it. To get < to show up properly you need to use the special metacharacter sequence
<>This is getting sort of ridiculous... I wanted to write "my primary key field" between "<" and ">" brackets, and somehow the text just doesn´t appear, though I can read it when replying. Sorry for the long sequence of replies!!
