This is the same for me and I have Flash. I tried to post a classified a few days ago, but gave up because I could not add images into the main body of the post... only through the SF-thumbnail method.
And to me, these thumbnails are a real pain in the ass. It now takes 4x the amount of time to look at an item having to click through each image separately. If the images were all shown in the body of the post (as before), you could quickly see if you were interested in an item before moving on to the next...and now there are a lot more items to look through given the new rules. The thumbnails in the results list are great however, just not in the actual post itself.