Enter http://www.mowendesigns.com or www.mowendesigns.com. That bug happened with me before a couple of.. Thousand times. That usually did the trick (or it made it "http://www.mobafire.com/profile/http://www.mowendesigns.com, but we'll take that later :P)
Yeah sorry, I assumed the browser would be smart enough to figure it out but I was wrong :) I'll fix it soon but in the mean time do as Scrax suggested and put "http://" on the front. This will make it absolutely clear to the browsers that you are linking to a different site, rather than a sub-folder on this site :)
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So I enter my site as mowendesigns.com
However, when I click on the link in my profile, it directs to:
http://www.mobafire.com/profile/mowendesigns.com
With the little I know about html, it seems like an easy fix, but hey I have only made my own simple website... -.-