I use Performancing For Firefox a lot. This is a handy extension that lets you start blog entries with a single click, and you don't have to sign in to blogger. So I've been using it for a while now, and the layout etc have looked fine to me.
Until today. I opened up my blog in IE 6, and I see that the extension apparently mishandles paragraphs/enter key presses, and it gives twice as many as I want. So if I press Enter twice to make a new paragraph with one blank line, it actually gives me two blank lines.
Hmm. I don't know if I should sit down and fix all the entries, or leave it as is. I think I'll fix the most recent few, and leave the rest as they are.