Just upgraded from 2.1.x.x and posts marked "new" previously are now marked "new plural"?
Using the Bittersweet theme with a couple light CSS modifications.
That's always the first indication your locale is broken. My suggestion:
I don't have any locales, but deleting all the .ini files from the cache worked.
Thanks! This still applies for Vanilla 2.3.1. Can it be moved to the 2.3 category?