Good Afternoon gcduck.
Thank you for your inquiry. We reverted the prev/next message navigation to stop the tears (colors not changing). It's a bit more load on the server, but it seems way too many people have a problem with the non-highlighting thing.
For the record only a very small number of IE6 and IE7 browsers appear to have the problem. Anyone using Firefox or IE8 should not have an issue.
Our technical team will push the update live on Friday night.
We appreciate your patience in the interim.
Kind Regards,
AGORACOM