Fwurg

[Mercury]

This is a reminder for me to fix this at some point in the near future(tm):

Monospace font on the span keeps running after closing of the hax tag. See as an example: viewtopic.php?p=27576#p27576

This is probably a mismatched span / span close.

[Brend]

That's a "user bug".

You are opening with [hax][message], and closing them in the same order (i.e., /hax followed by /message), breaking the nesting.

I suggest enclosing a message with the message tag, and only inside doing new formatting. Ideally the forum would understand the difference between block elements and inline elements, but alas.

[Mercury]

That was it. Fixed.