Facebook Timeline Problem

I tried to use the new 'post to FB Timeline' functionality today. Cannot get it to work, on submission nothing happens.

Hello,

Not really sure. Did you setup your facebook credentials? I can have a look if you can send me temp access via private message.

It's ok, I will not use this feature for now.

Problem is that Facebook does not accept pre-filled text anymore. The only way to prefill something for FB is to use Open Graph meta tags, otherwise the API is rejected:
https://developers.facebook.com/docs/sharing/webmasters#markup

My post to timeline had no prefilled elements by the way, don't know why that is rejected but at this moment, I am not spending more time on it.