Thanks Brenden, but this I think is not the case here:
we had to import a list of +10000's users. An SQL table. Not Kentico doc_types.
Data changes every day.
Those users, have an ID, a NAME, and a PHONE.
Now, we have a page, ex:
/users.aspx?ID=0001, and this page will use a repeater (select top 1), and will search for the name and the phone. I need the name to become the TITLE tag. It was working just fine on K7, now only for the Title tag, is not working anymore. But description and keywords are still working using my function. That's why it's weird.
Anyway, thanks a lot !