Description of problem: I can't go back and do a clean install after selecting upgrade. Version-Release number of selected component (if applicable): Fedora Core 6 Preview/Test 4 How reproducible: every time Steps to Reproduce: 1.Select to upgrade a previous Fedora install. 2.Click next. 3.Click back. Actual results: A dialog comes up that says I can't go back without rebooting because the previous Fedora install has already been mounted. Why not just automatically unmount it? Expected results: I could go back and choose whether to upgrade or do a clean install. Additional info: I chose to reboot and I can use the Fedora install selected to be upgraded just fine.
Once we set up for upgrade, we make some fundamental changes as far as installer state and also have read in the package information. At that point, unmounting may not be possible due to swap and other things.