Anyway, what it is doing right now is seeing "http:/" and thinking <Ok, I can just add /sitethatobviouslyhasnorelevanceyet.com and everything will be fine!>. But while it was thinking, I already started typing the second "/" and didn't notice so I got in "lo" before I saw the result. At that point what's in the field is "http:///sitethatobviouslyhasnorelevanceyet.comlo". The issues here are serious enough but it's not entirely surprising you can't reproduce them well.