+++ Mike_Ward [Mar 28 15 16:58 ]:
Given:
![text](C:/Users/Mike/Pictures/Screenshots/Screenshot (1).png)
The space before (1) prevents this from being recognized as an image tag (CommonMark.Net engine). Tried URL encoding (%20) but that didn’t work. Are spaces not allowed in path names?
See http://spec.commonmark.org/0.18/#link-destination
You can include spaces if you put the whole thing inside pointy brackets
<C:/Users/Mike/Pictures/Screenshots/Screenshot (1).png>
.
Or you could use an entity  
, though that’s uglier.