[Lynne]

Originally Posted by donnie_ogm

Anyway there will be some special efforts to convert the major modification from 3.8 to 4.0?

Special efforts by whom? It is up to the developer to decide whether to upgrade their modification. Someone else cannot come along and update the modification and then posted here *unless* they get permission from the original developer. You may, however, convert mods on your site for your own personal use (but not distribute them).

Originally Posted by donnie_ogm

And the last question is: what do you suggest to do, to a user of vBullettin with a quite big site (85000 members).

I suggest you set up a test site, take a backup of your live database and upgrade it on the test site and then fix/upgrade any modifications you may need. That is what I am doing anyway.