Hi Blade.
I'm so sorry about this very late reply. Been busy with work lately, didn't have the chance to try out the solution.
As it were, the Facebook pages seem to be loading normally now, at least for the time being. I believe it could be a problem with my ISP, but I'll try the HostXpert thingy if it crops up again. Does this mean that I shouldn't / cannot use the Hosts file that was recommended?