My Catasetum Fdk. After Dark SVO Plack Pearl I bought from Fred Clarke in 2011 has some awful looking spots on the leaves. I have taken a picture that can be enlarged to show spots better. Any ideas? A
Don't know what it is. Often an initial damage is later superinfected by fungus.
So don't place them too tight, give moving air, the humidity in the air shouldn't be high all time.
Check the underside for eventual insects.
As leaves are deciduous, you won't see the damage much longer. I would not cut the leaves away now.