Do you have a more clear defined process of what your looking at and where.
You can try turning off spider urls in admin options but I need explicit links of where your talking to see if I see any issues.
Who's Online - ReefTalk Gallery
This is our who's online and I am not seeing an issue with some clear.gif as I am not finding any reference to clear.gif in our files.
Do you have an explicit link showing your issue?