I had the same problem with Sarsa's Fire Lilly outfit. I resaved the diffuse texture under another name and it came out fine. Good, I thought, so I move the old texture out and renamed it to original name. Then it goes back to same problem.

As near as I can tell, it does not like texture beginning with lower case letter and ending in 01.

For cinderella ball gown, I rename sleeve from "sCLeftSleeve01" to "SCLeftSleeveA1" and it works fine. Don't know why.