I've since realized that these pages will load but they're taking a really, really long time.
My wife has also informed that the same thing happens every time she logs out of Hotmail too. It appears that she never gets logged out but she actually does.
And guess what? She says it's been happening since I installed the full version of ZoneAlarm.
Anybody have any idea what setting in ZoneAlarm (if any) could be causing this problem?