Problem with gallery resource

I saw another post reporting a problem with the mosaic options on gallery.

The same problem happens to me, I can’t see no option called “Display all your galleries in a cool mosaic” on the media settings. Also when I created the gallery, no option “type” is available.

I Tryed to do as this link shows:

http://en.support.wordpress.com/images/gallery/

I also tryed to put [gallery type="slideshow"] by code instead of visual editing. Unfortunatelly nothing, the gallery continues the standard.

I updated my worpress to the newest recent version and all plugins and themes…

Let me understand… Do I need a specific plugin for activing the options “slideshow”, “retangular” or “square”?

Or maybe something is wrong?