Some posts magically add the characters  â when we hit save.
http://ee-flow.wmflabs.org/w/index.php?title=Sandbox&workflow=05089b1c407334dffb6efa163e68c4ac&action=view#flow-post-0508cf1376fb34dffb6efa163e68c4ac
http://ee-flow.wmflabs.org/w/index.php?title=Sandbox&workflow=0508160b70af34dffb6efa163e68c4ac&action=view#flow-post-050816107cc734dffb6efa163e68c4ac
Ah, ok, tested:
- An n-dash (–) gets replaced with â. (In the saved version, as well as rendered version. If I edit the post, the dash is gone and â is there instead)
- A space followed by a colon, turns into Â. (But only in the rendered view. If I edit the post, the space and colon are normal, and no  is visible.)
See example post:
http://ee-flow.wmflabs.org/w/index.php?title=User_talk:Quiddity&workflow=0506915cf3d0b62ef835fa163e68c4ac&action=view#flow-post-0508d451ea6334dffb6efa163e68c4ac
Version: unspecified
Severity: normal