This just happened recently, but the titles of all my sidebar info has become italicized. It’s only on the main page, not on my About or any other page. The posts after my most recent are also completely italicized.
The way the code is coming out and being interpreted causes it to look like this:
<p>My husband and I aren’t much for these types of holidays. We will probably spend a low-key night at home with our little guy, watching <em>Cars</em>, <em>Elmo</em>, or <em>Mickey</em>. And you know what? I wouldn’t want it any other way.<br />
See the stray, unclosed <em>tag at the end?
Go into your dashboard and edit the post, then click the Text tab at the top of the editor to see the HTML.
Could you try removing the line break and empty <em></em>tags where I’ve indicated here:
Save the revised post and let me know how it goes!