Thank you for your post.
The button was removed from Mac OS X Lion. The button wasn't restricted to FileMaker Pro, as it was also displayed in Finder windows to show files. Clicking this button in the Finder also collapsed the status bar and stopped showing the search box.
The remaining options in FileMaker Pro are to pull down the View menu and select "Status Toolbar", use the keyboard shortcut command-option-S, or create a button that toggles the Status Toolbar.
Ok, thank you!
It would be helpful if this was actually in the Help Files. As it is, there is almost no information about the status bar in the files. One should not have to work this hard to find out this information (been perusing your knowledge database/forum for 1/2 hour now).