So, I tried centering an image (the image being the last item in the post) and upon submitting the post the image was no longer centered. This only happens when the image is the last line in the post, and is clicked on directly to be centered. Fixing the issue, for now, is as simple as hitting return to add another line under the image and center that as well. It is possible the editor is not placing the centering tag in the right places, therefore causing XF to strip it all together after submission. I'm using FF 3.6.8 on Mac OS X. I also, yes, did a hard refresh to get the new changes in .