For elements that are over 16384 pixels tall, and have a border, linear gradients using rgba colors do not work. You can see the scenarios here: http://scruffian.com/webkit-bugs/webkit-gradient.html Here's my user agent string: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.160 Safari/537.22 It's only in Chrome, not Safari.
Created attachment 193406 [details] test case
This is fixed