XF 1.1 Disappearing images

Hi all,

Bit of a strange one this. Have upgraded my forum to v1.1, no real problems apart from the fact that the smilie image beside the smilie dropdown has disappeared, along with the icons beside each forum to show whether there have been new posts or not. Why would this happen and how can I get them back???
Just an update, have got my forum icons back, just missing that smilie image now. You know, the smilie which shows up beside the dropdown when you are in the posting area.