E.g.: http://dev.jquery.com/timeline/ . The content pushes out past the right hand side of the screen. Root cause of this problem is that the Trac content is wrapped by a <div id="content">, but so is the main jquery site. It looks like some hacks have been put in place to try and work around this but it's basically been unsuccessful. The proper fix I'd guess would be to do something like renaming the outer <div id="content"> to <div id="jq-content"> (or equivalent) then adding to jquery-lite2.css:

#jq-content { padding: 0 37px; background: #fff; }

and removing the borders and width from #content in the same file (line 88).