Comment 19 for bug 400047

What's an "existing installation"? Do you mean an operating system? How about the almost jargon-free:

"Split the disk with the existing operating system(s), and let me choose which one to start when I turn on the computer"

Let me second sayantandas's call for an option to reinstall atop the existing Linux. Whenever there's a bug or problem in the installer, the user ends up with a half-installed Linux partition, which won't boot anyway. But when they reboot the install CD, there's no way to just install on top of that. Then there is no simple way to explain to a naive user how to recover. The easiest way appears to be to get out of the installer, run parted, delete the Linux partition(s), then restart the installer. I wouldn't want to have to explain that to my Dad...

(In such a state, the installer currently offers a "side by side" install, but it's completely unclear what will exist beside
what. Will it keep the Windows and the halfassed Linux install and make a SECOND Linux install? Which OS will it try to steal
the space from? I was way too chicken to try.)