[@Gisk]
Here's the issue, dear. Fixed it for you:

[i][color=black]Great, here comes revenge of the nerds... No,[/color][/i] Billy shook himself mentally, [i][color=black]We've all changed, you were just saying so. Give the guy a break.[/color][/i]

You have to put the coding things in order. So, if [color.] comes first, it has to be the last code [/color.]