Hi Joe,
Could this be a problem with your content? The RSS feed is already declared as UTF-8 format but there do seem to be a couple of unrecognisable characters coming through.
I’m not sure if you’re happy for your site’s URL to be published openly in the forums so I’ll share a relevant URL from your site by private reply to be safe – but essentially if you look at the sentence I’m going to highlight you’ll see what may look like typos when you view the event post in your browser – actually though there are non-UTF8 characters being mixed in.
Can you review the posts in question and try adjusting them accordingly?