I noticed some weird behavior of Markdown regarding adding hyperlinks to images.
Start with an image:
![alt text] : http://example.com/image.jpg
![alt text] and hit Ctrl+L (add a hyperlink). instead of the expected prompt for hyperlink URL, you just get:
In other words, the reference to the image URL is gone entirely!
Now, let's say you manually entered that link, then added another paragraph:
[![alt text]] second paragraph : http://example.com/image.jpg : http://example.com/page1.html
Now you want "second paragraph" to be a link, so you highlight it, hit Ctrl+L, and enter
http://example.com/page2.html as the URL and hit OK. You get this:
[![alt text]] [second paragraph] : http://example.com/page1.html : http://example.com/page2.html
Notice that the URL to the image has been completely removed!