On any server which needs errata updates do:
Software -> Errata -> Select All -> Apply Errata

And here I see e.g. this:
------------ cut ------------
System last check-in:	1/30/08 11:23:15 AM CET (0 days 3 hours 37 minutes ago)
Current RHN time:	1/30/08 3:01:12 PM CET
Expected check-in time:	1/30/08 1:23:15 PM CET (0 days 1 hour 37 minutes ago)
------------ cut ------------

Which is nonsense because I would like to know what time in future will
the next expected check-in happen.

   Thank you!
  Jasan