After adding new content type, drupal (7) returns to same window without any notification As in the title, every time I add a new content type Drupal returns to the same page and provides no notifications.

Also, the overlay window is full screen width. Any ideas? No error logs.
What do you mean by adding content type?
It Is normal that drupal return to the front page after creating a new content type...

Do you mean creating a node?Where does drupal returns?