Do you own a Belkin Wireless Router? Have you noticed that while on LAN, all your websites will load perfectly, but whilst using Wifi, your pages don't load and you need to hit refresh a couple of times (maybe more) till your page eventually loads?
I've been plagued by this problem since ages and tried every damn thing from upgrading the firmware to getting a replacement from Belkin (for free). But the problem still existed.
The solution was a very simple one. I came across it a couple of days back whilst searching for a solution on one of the forums. Go to the router settings and disable the Firewall!
Hope this helps someone!
Maneck
