I don't believe they make a mark against your account for the first time. The email is just telling you to get the thing fixed, I think.
From a player usage standpoint, I think they should make quivers able to hold at least 1500 arrows or bolts instead of 500. Sure you can just carry 4+ quivers in your pack, but it's kinda silly.
Or better yet, I'd like to see them make all quivers work as the 'bugged' ones do, and it's even easy as a design tech thing. Containers as a default tend to set themselves to hold stuff by weight anyway. Why not go with the flow on this one and make everyone happy? It seems to be just a convenience thing and an insurance cost thing (if you aren't carrying just quivers of infinity which are blessed). I can't think of a game-imbalancing aspect of individual quivers holding 3000 arrows or bolts when, at the same time, people can accomplish exactly the same thing 'legally' by carrying multiple quivers.
BTW. There's also a bug with "recovery" of bolts and arrows that makes it so that if you carry and use both bows and crossbows, and especially if you play in Fel, the bug will eventually force you into keeping the quiver on your back empty and carrying at least 2 quivers in your pack, one for arrows and one for bolts. What happens is that 'recovery' of stray arrows and bolts forces your real supply of arrows or bolts out of one quiver and puts them in your base level pack without your knowing or even being able to see it has happened, and inserts a 'recovered' arrow or bolt in their place. At that point you will have one quiver with, for example, your big supply of crossbow bolts, the other one with one crossbow bolt (recovered), and invisible to you, lots of arrows in the base level of your pack. Then, you die and your main supply of arrows goes onto your corpse and your corpse gets looted. The work-around is having one quiver be empty, in addition to quivers for your bolts and arrows. Someone should submit a bug report on that =p