It seems to be an intermittent problem that's going to have to be handled on an individual basis. There are some upgrades where the top_posters_30 the featured_member entries didn't get put into the PORTAL_BOXES table.

Not exactly why this happens for some users during the upgrade, but only appears to be some. Anyone with the problem can open a support ticket and we can get it resolved.

Not so sure it is just a upgrade problem.
Following up on another post HERE .
I can't seem to get the top posters 30 days to build in cache.
To recap that post I have a live and test board on the same host.
The island works on the live board which has been upgraded the last few versions but not on the test board.
The test board I just re-started from scratch with a net new install today. This is version 7.4.2
Your old login probably does not work anymore since I changed hosts.

You are probably pre-occupied with 7.5 right now but if you wish I can open a support ticket. It is just the test board right now that has the problem with the island.

Just FYI.
In my case UBB did not write to the tables for the top poster 30 day Island.
So Rick just ran a SQL command to add the island in the tables.
All is well now.

Aye it built fine on mine 2 days ago when I downloaded and went for broke. I also changed them over from a windows box to a linux box and it took to that very easily as well. The biggest issue was the IRC mod (Gizmo's mod at UBBDev) and that took about 5 mins to fix. So all in all with the exception of the shoutbox disappearing at random it is a great build. I am still playing with it though so there is way more room to break it.