Limits with CSS Editor


I tried to put the following piece of code in my CSS editor recently and the CSS editor filtered the code out. Is there any reason for this? Also are there any other reason that the CSS editor filters code or any settings I can change in the Settings area of the admin dashboard?

We're using CSS version 1.0 and Omeka 2.4
CSS code used
.enlarge:hover {
transform-origin:0 0;

The CSS Editor plugin always uses HTMLPurifier's CSS filtering. It's designed to prevent less-trusted users from adding malicious or just undesirable styles (or from breaking out of the style block).


Can HTMLPurifier's whitelist be adjusted in Omeka? is there any way to do this? The whitelist details are at