http://www.imagiscape.ca/blog/ - home page, admin home, all subsections - all blank.
I tried Firebug and Web Developer (Firefox add-ons) (I'm not able to get meaningful info from them for this - can you?).
I verified via browsershots.org that this problem occurs on all browsers.
I can access the blog via FTP.
I did not add any plugins, or change any plugin settings.
My server is a Linux-Apache-MySQL-PHP system.
I have not found the answer in existing WordPress Support posts, even though I read:
Help, my blog is blank.. as in about:blank!
[resolved] Blank Screen
[resolved] Blank Page
Blank admin page - moved blog.
Blank home page
Wednesday night my host moved my site to a new server, but it was fine when I worked on it on Thursday and Friday and Saturday morning.