carhartl/jquery-cookie — Issue #50: raw values containing the '=' character are truncated
Author: cwp
Created: 2012-03-06 03:18:01+00:00
State: open

From the Chrome console:

$.cookie('test', 'a=b', {raw: true})
> "test=a=b"
$.cookie('test', {raw: true})
> "a"

Encoding the value is an easy work around, but that's not always possible. For example, Google Analytics uses raw cookie values with lots of embedded = characters, and this bug prevents getting those values correctly.