2of3 Machines not allowing forum posts access

[Home Built]

I have three of my machines set up to access the Anandtech web site. With the newest machine the site comes up quickly with no delay and I can browse all pages, forums and posts with no problems. On the other 2 machines for some reason the pages are slow to load with none of the icons (just red "x"ed boxes) and when I click on any post it comes up a blank page.
All three of these machines run through the same router and have the same Lan setups. The real strange thing is that I belong to some other forums with very similar formats and those sites worK perfectly on all three machines.

 

[Home Built]

OK, I got a few lookers but no helpers.
How about if I narrow the problem down to the two older machines wont open GIF type files. Anyone have any ideas to fix it?
Thanks

 

[olds]

Try clearing the cache.

 

[Home Built]

I had to make some changes in my firewall settings. Now the forum pages load perfectly.

Thanks for the help.