It must have. Although I have no idea when. It must have been at least a few months ago.
There is what looks like a brown cataract covering most of the yellow LED. I've been wondering why the output of this Fenix L2D Q5 seems so weak and sickly yellow colored. Here I've been, condemning Fenixes for being so weak, when it turns out mine isn't even working properly. Please disregard my previous posts against this light's output.
I'll post a pic when my camera is in the same place as my torch.
I did a brief search on the internets and this doesn't seem to be a normal thing to happen. I also haven't even been able to find a price on the replacement for the head of the light. I know one place offers a lifetime warranty, but honestly I don't even remember who I bought it from anymore.