Problem with <title> generation on Joomla

On client's web site one big problem - i don't understand how of all page generated. It's somehow not use a title field.

For example: http://stankosell.ru/informaciy.html (russian) use keywords in title, but not title.

In which开发者_运维技巧 file i can find a bug?

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It depends on the extensions you have installed, some will manipulate the title tag. On a vanilla install with no SEO extensions the title tag comes from one of 2 places -

1. The title parameter in the menu item
2. The title of the article/category