yup, that is an issue with how the floated divs and tables ( ubbthreads ) don't always play well together
he is trying to wrap his ubbthreads ( table ) stuff in a left floated div (750px), then have another floated div ( 250px ) for some ads on the right. ( why not just have a ubbthreads side column with an ad there? )
threads isn't contrained to it's 750px width properly and you will get these collisions.
you could do 1 quick thing : edit the style and add a coupla css rules to the body_col class..
width:750px; ( fixes 2nd problem )
word-wrap:break-word; ( fixes 1st problem )