Problems after upgrade from 4.1.5 to 4.1.12

[Divvy]

Hello guys,

Maybe someone can help me fixing this issue that appeared after the upgrade.
This is my portuguese forum: http://www.viciadosnosexo.com
That is using 4.1.5 version.

I want to upgrade to 4.1.12, so to not take any risk, I have copy all files and database to a different domain and to see If everything is working fine before I do in the live forum.
The upgrade was run without any error, but something goes wrong, because the style appears weird, it seems a css problem...
Can someone please help me? What should I do to fix this?
Please check the forum in the test domain: http://www.pornhour.net
That is using 4.1.12 version.

One other thing strange, Im logged, and when I click in the "settings" link appeared the message:
We are sorry, this content is not supported via the mobile style.

Please help, thanks!

--------------- Added 1362948250 at 1362948250 ---------------

I think that I have found the problem.

This is how the styles appears in the 4.1.5 version:
Screenshot: http://i.imgur.com/4bZa88w.png

This is how appears in 4.1.12 version:
Screenshot: http://i.imgur.com/lbpUYRx.png

It seems that my custom style appears as mobile style, but I dont want that...
Should be the problem? How can I fix this?

Thanks!