Actually, NOT saying "thank you" might be in certain situations the more appropriate forum etiquette. A single "thank you all," for instance, is fine. Individual "thank you" after each post is annoying, to say the least. It appears as being polite, and yet often serves a different purpose. On forums like DP Review and Fred Miranda, threads get noticed and displayed on the front page based on the number of comments they receive. A sure-fire way to double your own thread count is to respond to every comment with a "thank you." Even on this forum, it bumps the thread up.
No need to thank me for opening your eyes, btw
