Binary package hint: ubiquity
I was trying to install ubuntu to a 4GB SD card today on a system with no hard drive, but the installer refused to proceed past the "Preparing to install Ubuntu" page because it claimed that my computer does not have 2.6GB available drive space. The "Forward" button was disabled, so there was no way to proceed with what would be a perfectly working installation. In addition to people running machines that lack hard drives, this bug probably also affects people with a full hard drive who may want to install to some form of removable media, and should therefore be considered a major flaw in the software.
Because of this problem, I suggest that a checkbox be added to ubiquity labeled "Ignore and continue (not recommended)" or something to that effect so that people in situations similar to mine are able to install ubuntu using the graphical installer, instead of forcing them to switch to the text-based alternate installer.
Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. If you test it and it is still an issue, kindly upload the updated logs by running only once:
apport-collect 659565
and any other logs that are relevant for this particular issue.