I have problem with linear-gradient in Mozilla Firefox 16.

On screenshow bad thing is visible (bad – light line at the bottom of block).
Code:
<a href="#">Button Text</a>
And CSS part:
a {
background: -moz-linear-gradient(center top , #88EB52, #3CA82D);
border: 1px solid #399A29;
border-radius: 4px 4px 4px 4px;
color: #FFFFFF;
display: block;
float: left;
font-size: 16px;
font-weight: bold;
line-height: 54px;
margin-bottom: 20px;
margin-top: 20px;
text-align: center;
text-decoration: none;
width: 376px;
}
I’ve changed line-height property on screenshot .
Can anyone describe what is it line and how to hide it?!
Thank you. Sorry for my English.
Tested in FF16 and working as expected. Maybe if you provide the line height value when the issue is appearing we can track the error. I suspect this is due to aspect ratio, if the issue is happening at all.
It’s not a flaw, but for consistency try to use percentage or values on gradient lines:
Here is the working fiddle: http://jsfiddle.net/FVcdu/1/