I am also a Core user. You should be able to register on the Zenoss JIRA to submit bugs - see this entry on the wiki - http://wiki.zenoss.org/Bug_FAQ .
Couldn't find your bug ref on JIRA - looks like an enterprise-style reference to me.
I have also had someone else confirm this problem on 4.2.4 this morning.
I'll update here if I get any more info.
Cheers,
Jane