I'm going to need help in baby-talk and tiny steps because I'm sure this is going to be a CSS issue and I don't know anything about how to fix CSS.
When I upgraded to v2.3 I ended up having to change templates as well because the old one I was using wasn't working, so I switched to using the Bernie theme. The only change I've made to it is to put a custom header in.
Now when I post image thumbnails in a post, it decides to ignore paragraph breaks and my post looks like this: Bernie - broken
No paragraph breaks where the images are.
Now here is the exact same post displayed in Tarski, which is the only theme I've found so far that actually recognises my paragraph breaks and displays the post as it should be, like this: Tarski - ok
Note I made no change to the actual post itself, only switched the template.
I've tried viewing in several different browsers (Flock, Firefox and IE6) and the result is the same on all browsers for both temoplates. I've also tried a couple of other templates (Mandigo and Ngatini) and they also behave the same way as Bernie, and it's just not usable at all.
My question is, what do I change in the Bernie template (and others) to make it behave like the Tarski one?