As a last fix before release, I have sorted the Chocobo Farm discoloured chocobos. If you recall, on PC they look waaay too dark when you select to move/feed/ride/release. Here's why:
There are four scripts called for the chocobo depending on how many races have been won (or the type [i.e., Wonderful] when out by the fence) that display the correct animation—whether the chocobo will be stood still, walk, run, or have the head down. Only the chocobo that runs will display colours correctly (frcyo > chokobo > script 5), because it's the only one that doesn't have an erroneous "activate / deactivate alpha blending". Script 6, 7, 8, 9 do - and those instructions need deleting. The only time alpha blending needs to be activated or deactivated is in script 4. It checks to see if your chocobo is on the world map and, if so, makes it transparent so that you know you can't feed it / ride it or whatever.
I am not sure why this is a problem for PC and not PSX [unless it actually is broken there too] - the code is the same from what I can see. But PC really doesn't seem to like the fact that alpha blending instructions can be used multiple times on this map. Perhaps PC is broken by such behaviour, whereas PSX is not. Either way it doesn't matter, because script 6, 7, 8, 9 of Chokobo are not meant to have any alpha blending instructions at all.
ps frcyo is sloppily coded - and that's annoying since it is also the largest script in the whole game. It's a total mess. Never seen anything like it. The Fort Condor ones are badly programmed - but even they aren't as annoying as this one is.