I just tried to remove the startuppro theme, delete all the plugins and then downloaded the 2.5.1 version to see if it would help…But still the same problem :/
I have now deactivated all of the plugins exept nivo slider. The problem still seems to be there. I also tried to deactivate and activate the nivo slider over again.
Is there something else i can try, or is it possible for you to take a look at it?