Хм, а мне втирали что обязательно во 2ом варианте качать Full Upgrade, и обновлять, утратив при этом все внесенные в код форума вручную и модами изменения.

A few security vulnerabilities and bugs in SMF 2.0.11 have been fixed. You can install this patch (click here to install) to fix your forum and update it to 2.0.12.
If you have any problems applying it, you can use the version posted on the downloads page - although, any modifications you have installed will need to be uninstalled. Please post on the forum if you need more help.