Logo link Problem

Hi there,

I copied my wordpress site to another server and got it running. The problem I am facing is when I click the main logo of the site I get:

“Forbidden
You don’t have permission to access /site on this server.”

Now.. this problem does not happen if I trail slash the address.
Imagine this:

http://www.domain.com/site/ – Works great
http://www.domain.com/site – I get the above error “Forbidden”

What can be causing this?
Any piece of advice is welcome.

Thank you.