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A comment on Chocolate maker Mars has ordered a recall of chocolate products in 55 countries. Parent comment

Re:Chocolate maker Mars has ordered a recall of chocolate pr... by noobie on Tuesday February 23, 2016 @05:47PM (#11162993)
Not really caching but as far as I remember there are HTML Open Graph tags that Facebook checks for in order to fetch the title/description etc.

Check N°3 on this link https://developers.facebook.com/docs/sharing/best-practices

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Re:Chocolate maker Mars has ordered a recall of chocolate pr... by prawn on Tuesday February 23, 2016 @06:26PM (#11163224)
And AFAIK the caching will run for about 30 days unless you clear it manually or through the API. Might be different for major sites.
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Re:Chocolate maker Mars has ordered a recall of chocolate pr... by jonah on Tuesday February 23, 2016 @08:19PM (#11163766)
Yeah, it caches the preview.

As mentioned in that doc, you can use the URL Debugger[1] to see the Open Graph data and even clear the cache.

I cleared the cache for the OP's BBC URL, try sharing it again and see what info you get.

[1] https://developers.facebook.com/tools/debug/

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Re:Chocolate maker Mars has ordered a recall of chocolate pr... by MiddleEndian on Tuesday February 23, 2016 @05:58PM (#11163046)
Good to know. I wonder how those ended up differing.
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Re:Chocolate maker Mars has ordered a recall of chocolate pr... by jonah on Tuesday February 23, 2016 @08:20PM (#11163773)
I assume what you saw was the BBC's title and summary at the time it was first shared (and thus cached) on Facebook. They've since edited it but FB keeps the cached version since the URI hasn't changed.
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