I just egged somebodyn and the amount of time until i could do it again was blank! I'm so close to finishing that achievement, so I was trying to keep a close eye on the time between eggings.

Also, my achievement counter seems stuck. It said I had egged someone 97 times, and then I egged someone 2 or 3 more, and it still says 97!

The blank timer kept happening to me today too. It stays blank even when I refresh, until I let a couple minutes pass and refresh again.