Hi Mitcho,
I’ve upgraded to 3.0.6, but still no luck.
I disabled all of my plugins except for YARPP and the problem persists. As a test, I enabled “cross relate posts and pages” — the only related items that appear on single post pages are posts. It’s as if pages do not exist to YARPP.
Definitely scratching my head on this one! Please let me know if there’s any other debugging data I can provide for you.