Weird social bookmark problem

I have a weird bookmarks issue.

Check out this post ( picked at random )

Topic Of The Week 32, August, 2008 - British Expats Australia - Aussie Connection

Under the first post, where bookmarks are displayed.

Furl is not displaying.

However, it is in our:

vbseo images directory:
forum/images/vbseo/furl.gif

However, checking the source, it should display, all code is correct, file path is correct. Yet only:

Digg Technorati and Delicious bookmarks appear.

All bookmark gifs are chmod 644

file path is correct, we have changed nothing within vbseo, recently to break this.

direct linking to the other gifs works fine, but furl for some reason will not display.

Any suggestions?

Ste

EDIT: fixed.

Did maintenance runs, recounts etc etc ... and now is working ( how weird is that )