Got a weird one for you.
Ubuntu Server installed with NTLM authentication. All works fine except for google images
With the filter turned off, it will display the images (of course it will) with the filter turned on it returns the google images results page as normal but without any images. (Please See Attached which was a simple search for FOOD)
I have 3 groups F1 (unfiltered) F2 (teachers) and F3(pupils)
F1 and F2 arent in use yet but F3 is.