I've received several inquiries from people wondering why the attachments on the Caption This! board are now so small, but actually those are simply thumbnails. Clicking on them will bring up the normal sized image.
Also, I believe I've figured out why the spoiler mod isn't working with our forum - it's because we don't allow HTML in posts. The mod writer has devised his spoiler feature in such a way that the HTML code for it is translated to our posts before the text of our posts is written to the database, but because we don't allow members to use HTML code in their posts (and likely never will because it can be a security risk), when the system reads the database to format our posts for our browsers, it sees the HTML code, tosses it out, and what we get in our posts is simply the word "spoiler" with the spoiler text also on display. Not particularly useful.
I can only assume that the mod writer did it that way because he does allow HTML code on his forum, and it never occurred to him to write his code so that it writes the spoiler tags to the database, which is the way every other BBC tag is handled, and then translate it to HTML only when someone's post is going to be displayed in a browser, which is also how every other BBC tag is handled. The only reason our older spoilers work is because he did actually allow for spoiler tags to be in older posts, presumably because he figured people may have been using other spoiler features on past versions of SMF and YaBB SE. At least he got that right.
But anyway, I may be able to figure out how to correct the code. Or, as I mentioned last night, I may just try to rewrite my own code for SMF 1.1.2. But either way it's going to wait until after I've finished/installed the Lightning theme...