Problem: How to enable maximize and minimize button in Fedora 15
Solution:
1.open Add/Remove Software
2. Search for gconf-editor and Install it.(After installation click run.)
3. Navigate to desktop >> gnome >> shell >> windows >> button_layout
4. Double click the button_layout and in value field copy – “:minimize,maximize,close” (without quotes)
5. Log out and Log in again…
Other tweaks:
http://ranjith.zfs.in/fedora-15-post-installation-guide-to-enable-extra-features/