Text won't wrap around images in twenty ten theme

Hello all-

Hoping one of you CSS gurus can help me here. I just updated my version of WP and now all of my pages and blog entries need to be reformatted (someone suggested creating a child theme to prevent this in the future…it’s on my to-do list). Now the text won’t align properly around the images, even though in the editor it’s showing up exactly as I want it to. It’s aligning at the very bottom, but leaving a huge white gap where it should be aligning at the top.

Any suggestions? Am I missing some code? It USED to work before the upgrade. Thanks in advance!

https://www.megandowntherabbithole.com