It's only highlighted in the post bit, if you contributed after we upgraded to vB3. It's an annoyance with the new subscription system and how it adds you to the contributors as an additional member group, instead of a primary (if the subscription changed your primary group to contributors, then major contributors, mods, and admins would be demoted upon contributing)
) and noticed my name wasnt highlighted. Came back 5 mins later and found it was yellow....what happened?