Unserializable Proxy problems confirmed
Uwe Schaefer 
Tuesday, 21st of October 2008 at 12:00:00 AMIf you’re having problems with Seam and passivated Session-Beans/Seam Components that look like this:
Caused by: org.jboss.serial.exception.SerializationException: Could not create instance of org.jboss.seam.persistence.EntityManagerProxy – org.jboss.seam.persistence.EntityManagerProxy at org.jboss.serial.classmetamodel.ClassMetaData.newInstance(ClassMetaData.java:342) at org.jboss.serial.persister.RegularObjectPersister.readData(RegularObjectPersister.java:239) …
then Seam 1.2.1 is what you want. This bug is fixed in this version and my webapp lives happily ever after
