Okay... I'm not a catt expert by any means, but since no one else has posted any ideas, and I see that 80 people or so have viewed this thread already, I'm just going to jump in here with a couple of questions...

How much time passed between the first and second picture?

Has it rained since your catt bloomed?

I don't keep my catts outside when they're blooming, but I do have petunias outside all summer, and they can start to look like this after they've been exposed to heat, sunshine, and rain. Petals that are gorgeous and fluffy one day will be scorched in areas if we have a particularly hot day (this looks like what might have happened to the top edges of the petals on your top flower.) It's particularly noticeable on the white-flowered petunias, and the damage looks similar to what you have on your catts.

Likewise, if there is a rainstorm and raindrops sit on the petals, it can cause all sorts of spotting. When I look at your flowers, I don't really see fungus/virus type symptoms, but more physical damage, like what happens to my petunias when it rains.

I'm sorry this happened to your beautiful flowers! I see that you have them hanging under a slatted roof. Could there be any chemicals in the wood that could be leaching out during a rainstorm and dripping onto your petunia petals? Do you put fertilizer in the water you use to water your hanging plants? If so, the fertilizer could be burning the petals where it drips onto them. Petals are much more delicate than the leaves themselves, and if this is your first catt to bloom, it would be the first time you'd see fertilizer damage on the flowers.

At any rate, it doesn't look like any kind of fungus I've seen, and it doesn't appear that anything's been chewing at your flowers... give some thought to whether your water could in any way contain anything that is burning the petals... and also consider how the sun is hitting the plant as it is in bloom. Blooming orchids are often moved to shadier, protected conditions when the flowers open to keep the petals intact, because direct sun makes blooms wither much faster and can burn them if it is too hot.

My guess is that there's something in the water that is falling on these flowers that's causing the spots, and that the raggedy-looking edges are symptoms of drying out from sun exposure.

Having said that... if any of you "catt people" see this and know exactly what it is, please correct me so I know what to do if it occurs on any of mine!

So sorry this happened to your beautiful plant! The blooms were just lovely!