Upon logging me in, I am redirected to the following page:
http://clients.overthehillweb.com/ha...isleflash2_swf=
Which is STRANGE as heck 'cause I don't know where that URL is coming from.. With SSU off, this URL displays the main site page. However, it does provide some insight at to why SSU hiccups. If SSU attempts to make this link SEO friendly you get this:
http://clients.overthehillweb.com/ha...isleflash2_swf
Which is exactly what happens when you login with SSU on and Zen Cart tells me that this page cannot be found.. (It's not a real page, so this makes sense too..)