When sharing a URL on LinkedIn, you may find that the share box does not display the Open Graph image and text as it should — simply showing a grey image with the website’s domain name instead. It appears that LinkedIn’s crawler is having problems connecting to some shared URLs — this could be a network issue within LinkedIn’s network, their network provider(s), and/or a bug with their crawler. LinkedIn is aware of the issue and their response on 2015/03/16 was:
I heard back from my research team and they were able to isolate the issue. Our engineering team is working on it but there’s no estimate as to how long that might take. We’ll do our best to keep you posted.
If you are concerned about the quality of your NextGEN Gallery v2.x resized images, this should be of particular interest to you.
Some months ago I contacted Photocrati to ask them how, in version 2.x, developers could retrieve the “actual” dimensions of a resized image. In the past, after resizing an image we could use PHP’s getimagesize() function on the resulting file, but in v2.x image resizing is dynamic and those resized images may not be available on disk. I had some concerns between the expected / calculated image dimensions, those returned by NGG v2.x’s methods / functions, and the actual image retrieved by the URL. All 3 dimensions were different! A resized uncropped image which should have been 300x200px, was reported as being 300x199px by the NGG methods / functions, and the image retrieved by URL was 298x199px!
This may not sound like much, but a few pixels here and there can lead to image distortion when rendered by browsers, alignment issues in page layouts, and failures when working with minimum image dimensions (for example, Facebook ignores images smaller than 200x200px).