I'm a bit scared to buy or have an infected plant.. the one pictured has perfect leaves, pseudobulbs/roots seem healthy and I think this pattern on the flowers is just that it's about to fall (when I bought they looked normal). Or am I wrong?
That drying along the edges of the flowers is a dead giveway. Thrips. Did I mention that I hate thrips as much as I hate scale???? Maybe even more... scale can be controlled with systemics, thrips come in and wreck the flowers, nearly impossible to prevent, you have to be in there with spray when you see them.