I dunno. Maybe they're starting to use some non-linkable HTML to cut down on bandwidth.
Here's an example just pasting the properties of their latest pic:

Here it is, using their copy-and-paste sample HTML:

more cat pictures
Sorry, I just don't think they like you.
I’m wondering if I’m a bit paranoid because my last two were digs at Obama. I can see all the other pictures on the site.
Just not mine.