I've used ATA for years, and I think I had this same problem some time ago on a differnet site, can't recall (or find here) the fix;
ATA 3.64 on a brand new hosting plan; many options aren't working, like header image height, backgrounds, etc- my page menu is stacked vs. horizontal.But page width & sidebar is working. Header image height is set to 204, but looks like about 30px, though I can see the correct image.
I seem to recall something about exporting and re-importing settings???
I tried to delete option bfa-ata4, nothing there.
Doesn't seem to be Suhosin, I've got content, just can't style it.
I've fixed this before, just can't remember!
URL is http://mikeethanmessick.net