PANIC: Circular dependancy

Upgraded to the latest Dapper release of Ubuntu Linux and got this kernel panic:


Begin: Mounting root file system... ...
Begin: Running /scripts/local-top...
PANIC: Circular dependancy. Exiting.
[4294675.656000] Kernel panic - not syncing: Attempted to kill init!

A synatic “Mark all upgrades” and “Apply” fixed the problem.