Comment 7 for bug 38171

Still true for hardy and intrepid.

N.b. the UUID of the swap partitions is changed by the installer, so if you are installing multiple versions of ubuntu on one machine, even if you do not use recognised swap in the new install, the swap will not be mounted by the original installation. This is because the UUID is used in fstab. A very useful alternative behaviour would be for intrepid to automount any swap it finds (perhaps unless it contains a hibernated image).