Wanted to keep everyone in the loop so people don't feel like their time has been wasted.
We discovered at the blocker review meeting today that there's a problem with the RC2 compose. Blocker and FE packages that were pushed stable yesterday - https://fedorahosted.org/rel-eng/ticket/5988#comment:17 - were taken out of the 'bleed' repository where blocker/FE fixes are pulled into composes before they go stable, but they did not actually get mashed/distributed in time to be included in the RC2 compose.
The upshot is that RC2 has incorrect (old) versions of initscripts, systemd and fedup-dracut. This means that RC2 will be subject to at least https://bugzilla.redhat.com/show_bug.cgi?id=1114786 , https://bugzilla.redhat.com/show_bug.cgi?id=1099299 and https://bugzilla.redhat.com/show_bug.cgi?id=1146580 , so it definitely cannot be released as the Beta. We will need an RC3 compose, and testing of RC2 will not be sufficient to clear RC3 for release due to the significance of systemd.
Testing of RC2 is not entirely useless - it's still useful to check there are no regressions in anaconda 21.48-13, for instance - but we will need to do a good degree of testing on RC3 when it lands later today before we can consider clearing RC3 for release. I'm very sorry to folks who've already put work into testing RC2 for the mistake. Keep your eyes peeled for RC3!