In Edit Gallery > Attachment Details, one can enter descriptions for images. They used to show up in posts with galleries and portfolios, but now they're replaced with "Previous" and "Next" navigation.
The linked images from gallery and portfolio thumbnails are now centred in their divs but I can revise that in "image.php" on line 28, and I can switch off navigation on line 53.
BTW, this seems to be a new addition because that PHP file is not in the original Portfolio Press folder I downloaded.
Unfortunatley, I know little of PHP yet. Is there a way to restore descriptions, etc?
PS: This test site is on a private server, so I can't send a URL.