Welcome to WebmasterWorld Guest from 18.104.22.168
If it's your feed just consider using plain old ' which is standard, and not left and right apostrophes, which not everything will handle.
You will have to convert them all to normal ' instead of the cool italic reversible quote.
Another example of MS being "standards compliant" by "embracing and extending" standards... AKA braking stuff.
This is a great forum. :-)