I’m having the same problem and have followed all of the usual suggestions (everything up to date, default template, disable all other plug-ins, etc). I don’t know what update this occurred on but I have updated several times since and the problem still exists. I had the problem on another site years ago and it corrected itself but this one has not.
You can see the effect here – http://ussbrownson.com/blog/?page_id=558
“There appears to be a maintenance plugin or something similar stopping that page from being displayed …”
I don’t follow that. Can you elaborate on it?
