Nathan Explosion

As you said, you went to your site. Go to /admin/upgrade first instead.

A little tip regarding the setting up of the CRON job to handle the tasks for rebuilding - I upgraded my 3.4.7 test site, containing ~56,000 topics/2,600,000 posts, to RC3 on Wednesday and calculated out that the rebuilding tasks would take close to 72 hours to complete even with the CRON job set to every 1 minute (was seeing only a .02% increase every minute for the posts rebuild) The smallest interval that a CRON job can run at is every 1 minute - but there is a way to go lower: sleep xx; (where xx is the number of seconds to wait before running the command after the ; ) I have 3 CRON jobs now set up to run the tasks, each every minute - first one is as presented by IPS when viewing the CRON options within the ACP, but the other two have sleep 20; and sleep 40; added prior to the same command. Result: the task processing was down to every 20 seconds, and I started seeing a .05%/.06% increase every minute for the posts rebuild as a result. So if you are in a position to know that running faster than a minute will not impact your hosting, then give it a try. Note: once the rebuild is complete, no real need to keep the extra 2 so just revert back to having the 1 running every minute.