--- Edited by Lokash20 13/05/2009 18:44 ---
-- Edited to remove unneccesary clutter --
Either way, I haven't be able to provoke another admin loading page hang.
-- Edited to add --
For the hell of it, I just tried logging in to the mirror testing site I use on my ISP (where I was having the original problem with the Admin loading page hanging) and all is well. I'm in! I wonder what on Earth was happening? Oh well, panic over. Sorry for any hassle I may have caused.
I'm going to trim my earlier post and try to reproduce the other issues I've found. If I can, I'll log them in TRAC.
Thanks for all the assistance, good people. I've learned a lot in a short time. :)