Mac Avatars HELP!

Hi, I downloaded the mac version of kudos, and I want to know how to ad avatars? somwhere cliff had said that the mac version takes png, not dds- so someone else converted all of the new avatars into png format, but i found that none of those work. they always come up as a white box. does anyone know what format the mac version does take? i’d really like to update my avatars!
thanks:)

also having trouble with the avatars. some work and some don’t, and some work fine until you add another update

the punk worked fine, then i added another avatar and now it’s just a white box and the black guy works fine. i want the punk back. i hope this gets fixed