Ok, you lit up my bulb ;)
I had a look to my DNS server log and the only thing "strange" is that is getting blocked some google domains and there is the problem, with mediafire, and with taringa (the other thread on this forum), after took a look to the http dialog with the http monitor (thanks to who ported this add on).
In the mediafire case (I didn't dig with taringa, but could be the same), it uses the google host to use this code https://ajax.googleapis.com/ajax/libs/jquery/1.6/jquery.js
Long story short, another script to trick browsers instead of make a programming nearest standards, even if they lost functionality to show "flashy" websites, hosted on a third party site as a CDN :/
So, guys, don't block ajax.googleapis.com :rollingeyes