There is one thing I can't get my head around in CloD - the gunsight reticle visible at all times (depending on the environment), even if the bulb is switched off. I know this has been discussed before, I thought it was a definitive bug, but as I raised the issue at the bugtracker:
http://www.il2bugtracker.com/issues/201
...there is quite a few votes against. I still believe that there should be nothing reflecting on the glass when the thing is switched off, I had a good look at few gunsights and I never noticed anything like we have ingame. Perhaps someone with more insight might be able to shed some light

on this please.