I'm on a highly secured military network. While it's not impossible that there's malware on my computer, I think it's more likely that something's up with the website.
Edit: There's no choice of browsers on this network. It's IE 7 or nothing.
The "secure" US networks are also just full of malware, because at the end of the day you have a bunch of random enlisted men clicking around in IE 7. I've heard plenty of accounts of the malware on these things.
http://sitecheck.sucuri.net/results/youthoughtwewouldntnotic...