We have this page, which includes a hidden image, at line 856 of the source code in format 726px x 226px.
<img style="margin: 0px;" class="facebook" alt="toolbox" src="/images/stories/media/Facebook/toolbox.jpg" height="38" width="100" />
When we press the share button below, we get http://www.facebook.com/sharer/sharer.php, which shows the image fine.
This is setup with Facebook meta tags:
<meta property="og:title" content="Parents Inc." /> <meta property="og:type" content="non_profit" /> <meta property="og:image" content="http://theparentingplace.automatem.co.nz//images/stories/media/Facebook/toolbox.jpg" />
In a "classic" Facebook profile, the image looks fine as well. However, when you switch the Facebook profile to timeline view, a centre crop is applied, cutting out the right and left side of the image.
The only documentation on Facebook share images I can find says the maximum aspect ratio is 1:3—this must have changed for Timeline. What is the new maximum aspect ratio?