I would appreciate seeing the marking on the leaves if you have time to post a photo. The leaves in the flower photo look OK to me.

I actually am worried about the leaves even in this photo. The uneven tone of green on those leaves...

I dumped most of my oncidiums for leaves issues.

Unless I have virus in most of my Milts and some Onc. mine do get like that sometimes. I just tried ordering some immuno strips from Agdia and Canada was not in the list for me to set up an account with them. So now I am waiting to see if they can ship here. Almost every other country in the world was on there :(

Sure I'll post a pic of the leaves this evening. The leaves in the photo here do look fine at first glance, but the unevenness of the green is the first stage of symptoms. It doesn't show well in the photo, but there is some faint but noticable streaking. The plant lives in isolation in the kitchen (with a Phal which I am suspicious of) and has its own container for watering. I would have tossed it earlier, but I thought that I would at least enjoy the blooms so that keeping it 18mo wasn't all for nothing.

I think I'm going to buy this book, Viruses in Orchids translated from Japanese to English by the the Royal Netherlands Society of Plant Pathology. A colleague forwarded me this a while ago, knowing that I'm into orchids, and plant pathology in general.

Here's a photo of one of the worst leaves. If that isn't virus symptoms, I don't know what is!

http://farm9.staticflickr.com/8238/8...647dc847_c.jpg
IMG_1424 by Camille1585, on Flickr

Yes, that looks bad. I don't have anything like that-yet!

Yeah, that looks pretty bad. sorry, Camille.
Hopefully you will get a nicer replacement in the future.