I finally got round to tweaking my sidebar and bringing individual sidebars for posts back (with just related posts for now, but with more post info coming soon). Anyway, I also added a Facebook like button as a temporary thing until I re-code the original share buttons I had, only to find my logs ram-packed with weird requests from facebook with ?fb_xd_fragment appended to the URL.
It’s something to do with outdated Flash players and Internet Explorer; I skim-read the bug report on it to find no real solution (just a multitude of crappy hacks). What surprises me is that this bug is a year old and hasn’t been sorted yet!
Anyway, my apologies if you had problems loading the site in IE earlier.