I suspect this is a bug.

With the upcoming demise of delicious bookmarks, I found myself in the process of looking about for a new place to stash all of my weblinks. After some research, I decided to give Diigo a whack.

Here it is on my phone:

To try it out, the first link I saved was their own blog.  I figured it would be a good thing to have.  Here it is:

Now, one of the things that Diigo does is give you the opportunity to download the text from your link so you can read it later, should you be offline.  Here is me trying that:

And this is what it looks like:

I think that something is wrong.