No luck there either. There are several that don't work for me. They just put a small little white outline of a square. I'm using an iphone and not a computer so I never made a big deal since it may be an issue with the phone browser.
I tried three different browsers on my phone with no luck. It works on my computer, though. I guess maybe it's got something to do with the size, so it won't show up on my phone? Who knows.