I was playing around with the dropdowns when adding new media and found that if I change the ".margin-top: -1px" to "margin-top: -29px" in .chosen-container-single .chosen-drop, I could completely hide the default text "Choose a category..." and Choose an album..."
It looks a bit cleaner now, but I just need to play around with the borders to make it look better. Anyway, thought I'd suggest it...
http://screencast.com/t/Gn0QhIrBD
Update:
This worked pretty well for me:
[CODE].chosen-container-single .chosen-drop {
margin: -30px 0px 0px -1px;
border-radius: 4px;
background-clip: padding-box;
width: 101%;
border-width: 1px;
border-style: solid;
border-top-color: #C0C0C0;
border-right-color: #E9E9E9;
border-bottom-color: #E9E9E9;
border-left-color: #C0C0C0;
}[/CODE]
http://screencast.com/t/SZhvWYDIZ
