On the Forum Summary
http://hogwartsbynight.com/casualrp/ultimatebb.php

What would I have to do to remove the off of the main page?

Of course on my site its the 'Open' Tag.

In public_forum_summary.pl find and remove the $msg_icon and clear your summary cache. You should be in good shape then.

What about increasing the space in the {LAST POST} table, so the "thread title" & "last post by" will always remain on the same line, rather than sometimes wrapping the name to line 2 and then the time/date stamp being forced to a 3rd line..?

do you have posts and topics columns turned on?

Yes