I have now uploaded a newly downloaded untouched folder with MLF 2.1.4 and connected it to an existing MLF database. I still cannot edit my own postings.

Next step: Made a clean installation with new MLF tables. Default settings, except that changed Editing postings to "all users can edit their own postings". I'm still not able to edit my own posts.

You can test it with user name/pw user/123.

(and yes, I can edit this post)