1) Always post the command line used (or log file line two) so we know what the
site is, what your settings are, etc.
2) Always post the URLs you're not getting and from what URL.
3) Always post anything USEFUL from the log file.
4) If you want everything use the near flag (get non-html files related) not
filters.

> I'm trying to capture a forum located at :
> <http://forums.warpportal.com/index.php?/forum/4-ragn>
> arok-community/
> 
> However, when I try to mirror this specific forum it
> grabs the entire site (including many other forums),
> which I do not want. I know that it's the fault of
> some links that gives access to the mainpage, and I
You are on the main page, so of course it gets everything.

Initially I'd suggest: -* +*?/forum/* +*?/topic/* but
<http://forums.warpportal.com/index.php?/forum/25-new-player-strategies-and-general-guides/>
contains a link to
<http://forums.warpportal.com/index.php?/forum/26-homunculus-headquarters/>
which is not what you want.

You have to list each forum you want instead of ?/forum/*
-* +*/topic/* +*/5-ragnarok-community-chat/*
+*/25-new-player-strategies-and-general-guides/* ...