My b2evolution Version: Not Entered

b2e previous version: 1.93
upgraded to: 1.10.03
www.sobrenada.org

Hey guys:
As above, I upgraded to 1.10.03 (last stable version) and everything is working ok. BUT I have an issue that worries me:
At backoffice, when I click on Blog Config (general tab), my url have 2 slashes after the .org. Check the printscreen below.

[URL=http://img89.imageshack.us/my.php?image=telaga6.jpg]http://img89.imageshack.us/img89/5250/telaga6.th.jpg[/URL]

Well, as I said, the website is working just fine (www.sobrenada.org), but some plugins are acting weird... and I have to config them properly because the system looks for them at the //plugins folder (notice the 2 slashes).

Question: What I have done wrong when updating? How can I fix that?

Regards!