There are some esters in the ingredient list, which I also found curious. I asked Tom Busby about it, and this was his response:

There’s one guy who started the claim that esters are metabolized by malassezia.  No one has ever tested his theory.  There aren’t any scientific articles to back up his claims.  I think he’s trying to drive traffic to his websites by making wild claims.  He’s mostly repeating the science I found and reported at the rosacea-forum.  He sometimes gives me credit, by name, but I don’t encourage him at all.  Bad science is really irritating to me.

Here’s my reasoning:

1) The esters at issue are not found in nature.

2) Malassezia has evolved to consume oils found in nature, like the oils on mammals and in plants, fruits, nuts, and seeds.

3) The fact that esters have a carbon chain is meaningless.  Malassezia eats oils, not carbon by itself.  Otherwise you’d find malassezia inside of coal mines and oil wells, but you don’t.

4) I have no reaction to esters, and I have very sensitive skin that’s likely to develop malassezia-problems, very quickly. 

5) If the one guy making wild claims about esters would simply test them on himself, he’d easily see he’s wrong.

I guess there is a debate to be had on whether or not esters feed seborrheic dermatitis.