Some icons in Tango theme are poorly readable because of border:
2. Paragraph left/center/right/justify.
3. Bulleted/enumerated list.
4. Increase/decrease indentation.
5. Line spacing.
6. Font face, font size.
(sorry for weird names, I translate from Russian version)
Here are some updated tango icons:
Maybe they should replace the current ones
Already fixed in master.
Removing love keyword as it never really caught on and it duplicates what "EasyHack" means (code pointer + dev willing to assist if needed).