I've been building a site in Drupal 7 with no issues over the past 3 weeks. But today, for some reason, logging in seems to be disabling certain things, ie the sidebar navigation links don't work as links, links within the content don't work and the gallery page (with hover preview module) doesn't show the hover state either.
The main menu works fine as do the links in the footer so I can't work this out. When I'm logged out, it all works fine too.
Can anyone help me on this issue please?