@Max

I've also changed border value to '0' from (border: 2px solid;) to get rid of the border around preview.

.preview{ width:75px; height:75px; overflow:hidden; position:relative; border: 2px solid; border-color:#fff; }

I hope this could be valuable information for someone else as well.

Also just crossed my mind, maybe transparency support would the best solution if that's by any means possible?

Thanks so much Max! Much appreciated!