I have a few possibly related problems.
I had the blank page problem that otherse have reported, but I modified .htaccess to allow 16MB for PHP and that has gone away, but I still cannot access edit.php. It is totally blank.
I also have a new problem with theme editor and template.php. Theme editor does not see files for Connections, although it did before. It says the theme file are in /, but won't let me edit. If I delete connections, it lets me edit WP Default and Classic Themes. With connections in there, I can edit Classic but not default. Same thing happens in template.php, when I click on "Files". I get the following error in a pink bubble:
Oops, no such file exists! Double check the name and try again, merci.
I am running 2.0.4 and haven't changed anything recently.