Advanced options save causes: Exception: javax.servlet.ServletException: deleted object would be re-saved by cascade (remove deleted object from associations): [com.redhat.rhn.domain.kickstart.KickstartCommand#32] Partitioning changes cause: "Any change to partitioning generates a very similar error, only this time it's: javax.servlet.ServletException: deleted object would be re-saved by cascade (remove deleted object from associations): [com.redhat.rhn.domain.kickstart.KickstartCommand#22]"
Spacewalk 0.4 has been released for some time.