PROBLEM blank screen after update

[0zz]

I don't know what was going wrong in your case, but just to be sure: Are you aware of the fact that any update intentionally "locks" the site? After performing an update, you need to open the backend login page once in order to remove the lock. Did you?

Yes, sure, I've run updates on many sites before. But I understood the problem: the client's website was too outdated with php 5.3.3, and this created problems with update. So now i need to find a way to update both - php version and GS. I guess it would be easier to transfer data and pages to the new install, but not sure if this will work...