Problems with Blogger

I'm having problems with my blogger blog. The font is different as I type this, and I cannot see boldface or italics. Plus, when I print, I'm told there's a problem with the HTML. I have to click "don't show" to print a post. This started with my last post--the one on the literal sense. I tried to explain what showed up when I typed in bold, but that put my entire blog in bold, and I didn't want that.

Any insights?

Thanks in advance for any help you can give me.