Thread:BunsenH/@comment-28858167-20160821001702/@comment-24577221-20160821012409

The steps that you have described are correct, so I don't know what might be going wrong. Perhaps there is some problem with the picture -- maybe just some weird little glitch that the wiki software doesn't like. How large is the image?

You might try the same steps with a different picture, ideally something fairly small. I don't know what the wiki's limits are.