- An update to SELinux enables upgrades from Fedora 7
- Updates to pykickstart that prevent errors from occurring when using the 'cdrom' installation source
- An updated kernel (of course)
- The famous upgrade loop (#372011, amongst others)
On of these bugs is related to i586 hardware, on which anaconda would be unable to perform an upgrade according to #367731, due to selecting the wrong glibc and/or openssl package for this specific arch. While, as you know, anaconda doesn't get updates during a release cycle, we backported the fix for this issue from anaconda development into Fedora 8 stock anaconda (18.104.22.168-2), hoping to resolve this issue. Obviously in this case we need people to test the fix to actually fix the issue, as we ourselves to not have any i586 hardware.
The same however goes for all the other issues we try to fix in a Re-Spin, lots of which we don't even know about (and thus cannot test for), and others we cannot reproduce and thus not confirm resolved.
If you are willing to help us in this quest, or know of an issue we might be able to take into account when doing a Re-Spin, please let us know via email, or visit us on FreeNode in #fedora-unity.