Ahh, I'll bet that's exactly what's going on. The textile plugin for s9y definitely doesn't accept single-quote for links, and it doesn't look like the "official" converter does either. Go to that link and try:

'this is a link':http://www.link.com/
"this is a link":http://www.link.com/

And you ...

Hi Garvin,

That's right, the format for links in textile is: "link text":http://www.link.com/

It gets converted to links as expected when I create blog posts, but not in comments. (You can see this happening on comment #5 in the link I posted.)

Textile is the only markup plugin I have installed ...

Hi, I'm using the Textile plugin for posts and comments on my blog, and while I have no problems with posts, I don't ever get any Textile links in comments people post, as seen in some of the comments here .

I am certain Textile is being applied to the comments, since all the rest of the markup ...