Why do some programs not remain on the dashboard?

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http://askubuntu.com – I have recently upgraded to Ubuntu 12.04. All the pre-installed software works fine, but some other programs such as Gimp Image Editor, Tuxguitar, and even Terminal have been giving me some issues. When I open up one of these programs, the arrow to the left of the icon that indicates that a program is opened does not appear. When I minimize a window from these programs, the windows disappear, and I have no good way to switch between open windows in these programs. Has anyone encountered these problems, and if so, have you managed to fix it? (HowTos)