Theme Menu Layout Change?

A screenshot is of no use. What would help is a link to your site and a reasonable description of the problem.

I uploaded the screenshot cause I revert the change.

The situation is this :

My blog address is https://www.nehemoth.com the menu layout is as below
https://img251.imageshack.us/img251/1064/menul.png

when I did the upgrade the menu look as below
https://img119.imageshack.us/img119/4189/menulayout.png

Thank you for the answer

I forgot to tell ya that What I want to know that if this is an expected behaviour or a real error?

That’s completely dependant upon the theme. You have quite a few CSS errors on that site which could contribute to the problem.

Thank you.

I will check those errors.

I have a pretty good idea from where they came