I started two sites on 4.7.0, one test, one production.
At the 4.7.1 patch release I patched the test, then the production sites.
Unrelated, the production site was subjected to heavy load, and a bug in the FreeBSD RELENG_6 pager was exposed. The HEAD for the FreeBSD RELENG_6 pager was applied, AND THE DRUPAL SOURCE WAS UPGRADED TO 4.7.2, and the production site was again subjected to heavy load, to failure for other, predictable, reasons (I've no prior paid SQL DBA work). Throttling was turned on for all blocks after the onset of non-pager-related load-induced failure, and the throttled system worked under load.
Now at each of the .1 patch application, and the .2 tar overlay application, the databases were dumped, the source tree archived, and the upgrade script run post-application.
At present, the production site's admin->settings links are not displayed as clickable links. Ironically, the test site's admin->settings links are displayed as clickable links.
I'm looking at the modules/system function system_view_general(), but as I've two autistic sons, and school's out, I generally get 5 or fewer minutes to think about anything other than dealing with stims, fixing chocolate sandwiches, and getting everyone to the swimming pool (and getting the same number out again).
I've diffed trees looking for clue, and poked at (note the no prior paid SQL DBA work, above) the data, but I'm still pre-epiphany, so errors don't (yet) suggest their root cause to me.