What is this and how do I treat it?

[jimbo0108]

I have noticed these spots getting worse and now the tips if the leaves are dying...what is going on...this is my beallara marfitch howards dream...I don't want it to get too a point of no return.

[NYCorchidman]

It's a fungal disease.
Usually they are just annoying to look at but do not kill the plant.
You can trim the affect part of the leaves off, or leave them unless it gets really bad.

Oncidiums and the related hybrids seem to be very prone to spotting diseases, and this is one reason I do not like to grow them anymore.