If you want the Photoshop main window components to remain visible, either right-click on the image with the Zoom Tool selected and choose "Fit on Screen" (which really fits it inside the Photoshop workspace), or use Tabbed View.
Pressing Control-0 (control zero) is a shortcut for Fit to Screen.
I have no idea why Adobe changed the behavior. Perhaps people reported that it was annoying to have the maximize window button not actually maximize the document window to fill the screen, which is really what it's supposed to do.
the fit on screen gives me an image, restored, with the hight right but not the width, just as you see in the first picture (also with ctrl+0 , zoom tool right click, and double click the hand tool).. i did mention it.
still, it was OK a couple of days ago, something i did, changing windows, tools, i dont know, cuased it, thats why i found it alright to post this question again, though no answer was given in the past.
so if it was OK and got messed up, there must be a way to un-mess it..
thank you anyhow, but it didnt worked.
I know of no way to have a Maximize operation result in a window that fits inside Photoshop's application workspace, except (as I mentioned) to open windows in Tabs rather than using Windowed view. Then the concept doesn't really apply - the entire workspace is available for document editing.
I suspect you are remembering the behavior of an older version of Photoshop, but hey, I'm interested to know if you find a way to do what you say with Photoshop CS5.