Dear All,
I am trying to figure out  where -webkit-margin * 
comes from in the Genesis theme:

ul, menu, dir {
  1. display: block;
  2. list-style-type: disc;
  3. -webkit-margin-before: 1em;
  4. -webkit-margin-after: 1em;
  5. -webkit-margin-start: 0px;
  6. -webkit-margin-end: 0px;
  7. -webkit-padding-start: 40px;
}

Did  search of everything with no luck. 
thanks

--

tony maciejowski