[Chris Burgess]

If you’re seeing WP logins work, and BB logins fail, then BB is probably logging you in and setting the wrong cookie path.

(You can debug this sort of thing by using a proxy which lets you inspect the headers as they pass from client to server – I recommend the excellent Charles Web Debugging Proxy.)

I fixed this using the WP Cookie Root plugin. Changing the COOKIE_PATH defines for me hadn’t worked, but the plugin did.

https://wordpress.org/extend/plugins/root-cookie/

Q: With deep integration, I see any postings to BB get double-quoted, eg an apostrophe posted to the forum will appear as ‘ …

Here’s hoping BBPress doesn’t munge the line above. Apostrophes appear in the forum with a backslash to escape them, because both WP and BB are running the apostrophes thru their escaping function. How can I avoid this?