Here is a preview of what you just replaced.

Userinfo icon		Did not replace.
Community icon		Did not replace.
Syndicated icon		Did not replace.
Protected Entry icon		Did not replace.
Private Entry icon		Did not replace.
Custom Group icon		Did not replace.
Santa Hat User		Did not replace.

Simply copy and paste this block of code at the bottom of your Custom CSS box.

/* Generated by Malionette's Tiny Icon Generator */

Or did you wanna try again?