Just as the XP 7.9.0 release flew from our hands to the vast spaces of the Net, we were aproached by one of our customers who struggled with a problem affecting their cluster. The problem turned out to be a bug we promptly fixed. Obviously, we wanted the bug fix to be available not just to one customer but to all users of XP, so we decided to release it as XP 7.9.1 (and 7.8.5). If you are about to upgrade to 7.9.0 and running a cluster, then we suggest you go straight to 7.9.1 and have one upgrade less to worry about.
Changelogs are here: