Sorry to leap from area to area to make these points (I wouldn't count a format change as a bug and didn't see this thread until I looked around).
Images that illustrate a point should (in my view) be largely discernible at a glance.
It brakes the flow of a discussion if you have to click on an image to see it at all.
I'd prefer to have a reasonable standard size limit which can be clicked on to get a better look so people following the thread can make out what the postee meant without clicking but if they want to put the effort in they can make the effort to open up the full sized image.
Having a row of in thread links might speed up the loading times but it may slow down the flow of appreciation of the ideas presented on the page (an image can sometimes be worth a thousand words and the extra loading time).
Archived images from early on in older posts could also be adjusted to meet the new size limit.
Many people like to back track on older threads and when images go missing or are cropped short by format changes it can undermine following a long lived thread.
A wider format would be most welcome.
Discussion forums are for reading and small text compressed into the centre of the screen doesn't necessarily lead to a better reading experience.
As before thank-you for taking the time to maintain this site and for offering us viewing options rather than just imposing a look because you like it (sadly a lot of forums have bitten the dust because they are run by people without your open minded attitude to updates).