oops should have checked here first - just removed 50+ links to WordPress Codex pages that were returning 403 Forbidden errors. hmm is there a way to reverse "unlink" in BLC?
I assume WP has added some new security filters and something is probably not quite right. ;) Ran some HTTP Request checks and all returned 200 Ok so it does not appear to be a Request Header or Response Header issue.
hmm now this is interesting. A lot of those links were literal URL's such as this: http://codex.wordpress.org/Giving_WordPress_Its_Own_Directory
Those links are still linked correctly and are not being seen as "bad" links by BLC. Maybe it is actually something going on with BLC?
Next did a Forced Recheck on the BLC Advanced Tab
The "Nuclear Option". Click this button to make the plugin empty its link database and recheck the entire site from scratch.
And a known bad link is not showing up as a bad link in BLC. Should be returning a 500 error and is not.
Oh hold on BLC is still working/checking the entire site my bad....
interesting the literal WP Codex links are not added back to the BLC DB table?
The other thing that is interesting is that i have several other links pointing to WordPress.org and they are still 200. So it appears it only had to do with URL's with "codex" in the URL. or the Codex subdomain itself.