Marina -<p>
I found a solution to my problems (thanks to some colleagues and the guys over on the #glassfish IRC channel).<p>
Within my create() function, I needed to do a merge() instead of a persist.
<p>
em.merge(dayStyleAssignments);
<p>
Thank-you for your help.
[Message sent by forum member 'aantix' (aantix)]
http://forums.java.net/jive/thread.jspa?messageID=205366