I dont think its lag or spyware.... at least not in my case.
I would have to ask if you are doing this from home or work?
If from home, what is your connection? DSL or Cable? (I assume high speed)
In any case, I highly recommend adjusting your MTU. This fixed lots of broadband connection and speed related issues, especially with fragmented packets from DSL:
www.dslreports.com/drtcp You can get it here and set your MTU on every NIC in your system (not dialup tho!) to 1400. Takes a reboot I think to take effect.
If you are connecting from work, is there some sort of proxy? I know at my work, I get exactly the same thing you descibe.... page cannot be displayed in the same scenarios... have to keep hitting back or refresh.... often have to double and triple tap "submit" to get it to post. I still havent solved that one at work, I have to assume its the proxy (ours SUCKS) because when I bring the same laptop home, ARFCOM works fine... behind my DSL/ROUTER.... and works fine from anywhere else I use it.