As I flip through some dbs, I see some set with this state. Never noticed this.

Not sure if there's an issue here, but I agree it's disconcerting. I found this: http://msdn.microsoft.com/en-us/library/ms345414.aspx

My guess is this means that we have transactions in the active portion (active VLF) of the log and you need a log backup to clear. However, a log backup won't necessarily move to a new VLF, maybe because of new activity? Strange as I have some dbs in full without this and some in full with it.