Hi,
I had to delete the file "maintenancemode" in the Gantry folder. Then, I had to disable the Gantry cache
Those are known bugs with 1.29 and 1.30 update for Gantry. They have been fixed for the new version, and those temporary solutions work very well too.
If I want articles properly formatted, I have to use the html editor. And... if I switch from html to visual (and viceversa), I lose the formatting. (!!!)
This is a WordPress bug unfortunately; so we can't do anything about it. I read somewhere that the only solution is to not switch between the Visual and Text mode, stick to either one to format the post.