Really, it can.
If you use Live Writer and the Remote Posting plugin to maintain your blog then (in Live Writer) you need to go into "Tools... Options... Editing" and UN-check all those boxes which say "Replace hyphens...", "Replace straight quotes..." & "Replace other special characters" otherwise if you use any special characters in your post titles (e.g. three dots "...") that will get converted to a special character and trip up your feed.
It just happened to me.