I did a clean install of 12.10. I always use a clean install on multiple partitions so that it is easier to return to a stable version.
Adobe flash does not work and seems not to be supported by Adobe.
Login does not allow both Unity and Cairo Dock to both work. You must choose one or the other.
The system locked up twice. This never happened in 12.04, a stable release.
Returned to 12.04 before I could find any other reasons not to use 12.10.