A 'thank you'is nice, but I don't really need it. It's much more important to know a question has been answered and the sollution worked.

Are you looking for common courtesy, TruongAn, or a sign that the question has been satisfactorially answered, so people looking at threads in the future can see the solutions that worked?

So, the conclusion is that user is encourgaed to post back, but it is not and will never be a rules.
So, If a user register in to our forum, where can they see a text that encourage them to post back.?

In my sig

In your what? linmix

sig. = signature (the comment at the bottom of a post)

One thing I've noticed is that the same questions keep getting asked. Like in the slackware forum, there are a couple of sticky's, but some other very useful threads take a lot of looking for. I know there's the answers section and the wiki, but sometimes what you want isn't there. So I'm wondering if there's a way to have more stickies or perhaps a link to the 'Top Rated' threads. If threads do get a grading will there be a way to access them? Maybe that's getting too complicated. Maybe we should be encouraged to add more to Linux Answers.

Definitely add more LinuxAnswers. All having more stickies will do is push all new posts onto page 2 - stickies are regularly requested and seldom read.