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I've decided to go with v3.9 for my new site (let the questions begin ).
When uploading multiple photos into an album the upload is announced on the main activity feed on the dashboard. It displays one of the photos then a link underneath that says, "See ## more posts from Member Name." When clicked, each additional photo from that upload is then displayed in it's own feed post. Didn't v3.9 used to show several photo thumbnails (nicely formatted) from the upload in a single activity feed post with a link to the album?
Sorry. I'm rusty and may be remembering things wrongly.