RC2 no longer displays unread message count in header

[tofinoguy]

I just updated from RC1 to RC2, and everything seems to be working fine except for the count of unread messages no longer being displayed. If I remember correctly, this would only occur if server caching was turned off in the older versions, and I made no change to that. The only difference in my installations (I used the upgrade instructions) is that I reverted to the default skin from BlueTabby as it has not yet been updated. Any insight?