I've sent an email to support about this, but wondered if any other users have ran into this before. I'm using MistyLook with the CSS upgrade and noticed that the link for older posts has disappeared from the bottom of my first page. It's still missing, even when using the default CSS, so I don't think it's anything I have coded incorrectly.
I have mine set to show 5 posts per page, and figured out that changing that number causes the link to reappear. Five seems to be the magic number that erases the link. Weird, eh?