White screen after upgrading to 7.2

I've upgraded my portal to version 7.2.

Something went wrong - at this moment I've white screen.

Do you have any ideas?

If your able to, check your apache server log, and or turn on "display errors" in your php.ini

I'll pay 30 euro to the person who can help me.

Your profile is set off.

I would be willing to help you.  PM me because I need server details.

I keep telling people to work on a clone of their site first; it helps to prevent taking a live site down.

 I know, it is a MUST for this upgrade process to check your site

This was some missed steps to changes in the header.inc.php file.

His site is working now and he is happy.

 Just to mention here...

This is a client that holds a license and was under the impression that Boonex upgrades all sites, and also should test all clients sites for them for module compatibility issues because they hold the license... 

They were also unaware of the EVO template and it's change, mainly that it is set to the default template and all the old changes they made to there old site would be gone.

The reason for mentioning this, most NO one reads the blogs Andrew is posting, older members are, but not the newest customers.

Somewhere along the way when the notes were changed to Blogs and no one's "notes" got listed, no one bothers going there now. I only go because I get an email sometimes.

It's late here so I hope this gets across like I think I thought it did when I did it.