Facebook Share button Sometimes not showing the right image - html

I'm working on the obituary section of a funeral home website. Users can click the SHARE button under the person's picture to post the link to Facebook.
Obituary listings
I have meta-tags for the page title and image, labeled like Facebook tells you to: <meta property="og:title"... and <meta property="og:image".
The problem is, the title and image that show up when you click the share button don't always show like they're supposed to. Sometimes the photo and person's name are right, but sometimes Facebook just picks the site's header image instead of the photo, and the site's title instead of the person's name.
Does anybody know why it isn't working consistently?

It looks like this is a Facebook cache issue, which there's nothing I can do about.

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When I send a site link in the direct message, preview image didn't appear. The title and description appear only. Maybe I need put some meta-tags to my html page? But when I share link to facebook or Twitter they show good.

Direct link or html code to get facebook likes by cliking in a picture

I need a method to get likes for my facebook page directly by cliking on a picture
I mean when a visitor of my website click in a specific picture he automaticaly likes my page
with facebook social plugin I got this link but it doesn't make you liking the page automaticaly you need to click the like button and confirm
I don't know how to get that link or html code , "I visited a website uses this method"
I hope you can help me
I researched this as well but I can confirm you that, since this could be easily abused to mislead the client and obtain a load of likes, it is not possible in an official, Facebook-approved way.

Facebook thumbnail image

How do I select an image to show as a thumnail for when someone likes something on a site. Right now I have this
<fb:like layout="button_count" colorscheme="light" href="myurl" ref="something" show_faces="false" width="150"></fb:like>
When something is liked it seems like a random image is sent to the facebook wall, I'd like to send a specific image. to facebook based on what page my content was liked
I think it's the Facebook Open Graph tags you are looking for, specifically the og:image tag.
Try viewing these links:
http://developers.facebook.com/docs/reference/plugins/like/ specifically the "open graph tags" section.
http://developers.facebook.com/docs/opengraphprotocol/

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When I click on the fb "like" button on my website, the result does not look good on facebook. The picture displayed on FB is the logo of the website, unfortunately my logo is white, so white logo on white background does not look good. Is there a way to tell facebook to display an other image instead? I tried meta property="og:image but without success. Thanks
Try the Facebook Linter to see the results Facebook is pulling from your site's og-meta tags.
https://developers.facebook.com/tools/debug
Whenever I change any of the values for one of my sites, I use this tool to validate what can be seen on FB, and it also accelerates updating the open graph, because sometimes, results are not immediately pulled from your site when updated because older values reside in the cache.

Set picture to appear in Timeline when page is 'Liked'?

Whenever a user Likes/Comments on a page of my website, and it subsequently appears in their timeline as a post, the image/icon that appears with the post is one of the social icons from said page (i,e the StumbleUpon/Tweet icon) and not the preview image.
Is there a way to set the preview image that appears with the timeline post when a user Likes/Comments on a page?
Here's an example of what I am referring to (in this case with a StumbleUpon icon from the page):
Have you specified tag in head of your page.
<meta property="og:image" content="tag value"/>
where "og:image" is the URL to an image that represents the entity. Images must be at least 50 pixels by 50 pixels. Square images work best, but you are allowed to use images up to three times as wide as they are tall.
This image is pulled from the website on Facebook page when a user likes or comments on your website where like button is placed
You need to have og:image meta tag on page. Image specified that way will appear in published post (no matter where post is displayed timeline or feed)