What's wrong with my Facebook pages?

[biggest gleek]

All my other Facebook pages work,but when I try to click on the ones that have notifications,they wont work.The screen just goes blank and it wont let me go back or anything.It has never done this before and was working just fine not even two hours ago.What on Earth is going on?

[Lynzeigh]

This happens every now and then, don't despair it will soon return, obviously the site is down for maintenance or updates I suspect! Mine won't load either!