I've upgraded my PHP version on a v4.6 Drupal install (as part of going up a few Fedora versions), and have run into what seems to be a known problem with junk curly braces appearing on the page (http://drupal.org/node/42080).
The fix listed is to login and change the default theme, but I can't do that because the ?q=admin/themes page just says 'you are not authorised to login' and there is no login form :-(
Any bright ideas ?--
Tom C 'We can lick gravity, but sometimes the paperwork is overwhelming.' - Wernher von Braun