I was just trying out chat for the first time and because I wanted to make a comment on an answer I started my message with a link to that answer. I typed: http://sustainability.stackexchange.com/a/805/99
but to my surprise the link was not expanded. The permalink to the chat message just shows it as plain text and in the chatroom the link is shown as 'sustainability.stackexchange...' (clickable link). Is this a bug? Shouldn't the link automatically have expanded?
I've tested some links in the chat sandbox and there all links were expanded.