According to what I see in my WP admin, I'm running 1.5.2.12 (I have a developer's license). A notice appeared in WP to update to 1.5.3 (which it looks like may have gotten name to 1.6? I am confused at this point) at any rate, I've tried the automatic update several times and it's not taken. I've registered the copy on this site (it's a dev site so i don't post the url publicly) and the green check mark appears next to the field, so I'm assuming it's registered okay. Known bug? Ignore it? Download it somewhere?