Getting rid of Twitter Bootstrap thumbnail border -

i'm trying rid of default thumbnail thin grey border in twitter bootstrap.

i can target borders, example if use:

.thumbnails > li { border:1px solid red; } 

all thumbnail borders change red.

but if use:

.thumbnails > li { border:0; } 

it still leaves borders thin grey line. cannot rid of that. i've tried change color white (my background white, solution) doesn't work.

how can rid of thin grey border?

thumbnail borders applied .thumbnail element, inside <li>. anyway, "extra" thin line talk box-shadow applied class.

so can try:

.thumbnail {     border: 0 none;     box-shadow: none; }