Toolbar at bottom of Gnome desktop

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http://www.ubuntux.org – I installed Ubuntu 9.10 about 6 months ago on a Dell GX280. The monitor is a KDS. The maximum screen resolution Ubuntu allows is 800x600 and the bottom toolbar on the desktop is missing. I now have the following problems: (i) Whenever I hide a something I'm working on, I can't get it back because the bottom tool bar is not there. (ii) Because of the screen resolution Ubuntu imposed I can't access things at the bottom of windows from programs I'm running. For example, the next or accept or exit bottuns that appear in many applications don't show up at the bottom of the screen. (Distributions)