www.thestar.com is a good example.. it hangs where a bunch are completed and waiting for the last one.. then slow again on loading the page.. Using Camino, the site responds right away and loads fast.
Confirmed. Safari blocks a redirect while trying to load a subresource from another domain (because the server doesn't respond), while Firefox goes on. This subresource is loaded via an Image object: var img = new Image(); img.src = "http://te.thestar.com/blank.gif?0.8177388644859841&snippet_version=1.2&referrer=&page=http%3A//www.thestar.com/&timezone=-180&var_PageCategory=/thestar/Homepage"; location.href="http://www.thestar.com/NASApp/cs/ContentServer?pagename=thestar/Render&inifile=futuretense.ini&c=Page&cid=968332188492&pubid=968163964505 &pubid=968163964505"; // blocks here
http://www.thestar.com/ seems fine to me using WebKit-SVN-r38064.dmg on Mac OS X 10.5.5.
The site works for me now, too, but I do not know if the root cause has been resolved. Someone should try making a test case from the discussion above.