Wikimedia developers wikitech-l@Wikipedia.org writes:
Yes, a check for $wgEnableParserCache got lost in some recent refactoring. It wasn't noticed immediately since some of us have that table in our test databases. Thanks for the bug report, it might have taken a few more days to find and fix the problem without it.
Thanks for fixing this quickly so I could upload my few changes.
I actually keep the installed source on our own source control system, with release, development, and "production" branches so I can merge changes around in a controlled fashion.
Nick Pisarro