Hello,
Thanks Abe1 for this nice hack. May I suggest a feature that marks the thread the same way after you replied? For example:
http://img18.imagevenue.com/img.php?..._122_890lo.jpg
The arrow appears when you replied in the thread (ie. posted). I think it's usefull if the arrow button also appears when you thanked a post in a thread but didn't post a reply (thanked only). On my board the thanks kinda replaces the reply system as a meaning of showing appreciation.
Greets,
SybaKaos.