I fail to see what "Use standard Internet signature style" has to do with persona based signatures - but enabling it in the default and other COS's seems to have fixed this problem.
It seems odd to me that that option is by default turned off, giving the appearance that the signatures function is completely broken - except that it's not, the admin simply must enable a feature in the COS that does not seem to have anything to do with the signatures feature (based on description alone). I still have the signatures, and I can still use them, but only under very specific circumstances, until I enable a feature buried in the administrative functions..
Perhaps you could provide some meaning as to what that option is intended to do, and why having it disabled by default, thus breaking a commonly used feature, is better than allowing people to turn it off, but leave it on by default so the feature works correctly.
I liken it to having to lock your car doors in order to buckle your seatbelt.. neither is inclusive of the other, yet in order for the common function to work, you have to know about and set the uncommon one first.
