Well, that upgrade didn't work here.
Luckily I saw some people having problems with this, so I tested it on a test site first.
The backend updated without a problem.
But on the frontend, the page was totally white, except for the single very latest product in the top left corner.
When I press the product, THEN the page shows as it should.
So it seems all the links and pages work fine, but not the default start page.
So, I did the line 583 alteration instead on my live site. ;)
Linux
Joomla 3.3.6
VM 3.0.2
PHP 5.3.29
Apache
Enable in the vm config the php debug developer mode and enable vmdebug for all. So we should be able to see the fatal.
I got a little suspiscious... so I installed a basic template, and the site worked.
So I went over to where I purchased the original template and they had released an update just a few days ago.
So, I installed that, and now it's working correct!
Sorry, my bad...