I have had a few users with a slight issue on this theme and hoped you could help.
On the forum page or topic list, if there are 'new' replies a little 'new.gif' image displays (it's just a yellow gif with the word 'new' on it).
Some of my users say that the gif doesn't work at all... they get that default broken image pic instead and it doesn't look good. I've tried everything I can think of - I even linked the gif in a post, and they saw it so it worked, but for some reason it's not showing up on their screens in the topic list.
We've also tried:
clearing the cookies and cache
changing the settings on their browsers
The same problem exists across all browsers for these two or three users. I can't replicate their problem, the image works for me on all browsers and PCs so far. I don't suppose you have some clue what this could be?