Yeah, that was me! It's my pet

Helium. They're showing as unnominated but "ready for nomination" on my Pet Spotlight page, whereas they were nominated before. All text related to nomination has disappeared from their profile. Previously it shows "this pet has been nominated," but now there's nothing. Viewing it logged out, the "nominate" link does not appear either, so I'm guessing that's what happened on the profiles you saw with empty spaces.

I haven't gotten an answer whether this is a glitch or intentional or what, but a couple people have said that Helium still showed up for them to review, so I'm not as worried about it as I was at first!