As the title states. Unfortunately, I can't post an image right now to show what I mean.
Specifically, hyperlinks and images show as their HTML tags in the search results. Search "blue score" (no quotes) on Meta for an example of a question with an image.
I'm not sure what to do with hyperlinks, but images should probably be stripped down to a searchable marker that contains the image alt-text. Something like "[Image: image alt-text]".