Clicking Edit button makes dashboard top disappear

Permalink
When I click the Edit button, the bar completely disappears, so I can't edit the page. It is as if I've logged out.

It happens in the Default themes, too. It's not something I did to my theme.

Why is this happening all of a sudden?

All files permissions are 755 and everything was working fine last week.

 
zoinks replied on at Permalink Reply
NOTE: Seems to be related to C5 signing me out every couple minutes for some bizarre reason??? At lesat I *think* so...

EDIT: No it's not... just randomly starts doing it.

Why is this happening? It is a little bit scary since I am close to deadline and have no idea what is wrong here.
zoinks replied on at Permalink Reply
Also getting "Access Denied" when I try to add pages through the Sitemap.