Hullo.
Followed the instructions for the 4.0.3 fix, and it is now parsing links correctly in new posts.

Thanks for that.
However, when I try to rebuild the old posts, instead of loading a screen telling me it's processing posts 8900 to 422342200 or whatever, I get a blank screen in my ACP.
There's no error logged in my NGINX error log nor my PHP-FastCGI log that seems to have anything to do with it.
Suggestions?