@castles_made_of_sand can you please consider changing following thing?
if operand will be set to
"operand": "text.html, source.css, source.scss"
base encoding will work in css and scss as well, also I think actual encode_to_base64 function is a little bit wrong, so in \Packages\ZenCoding\zencoding\actions\basic.py line ~ 773 if you change
editor.replace_content('$0' + b64, pos, pos + len(img_path))
editor.replace_content(b64, pos, pos + len(img_path))
it will work nicely.
Also I confirm that I'm having issues with snippets as well. Another bug report is that when I call 'wrap zen as you type' on couple of selected lines or on multiple selection - lines disappear. However it works for just one line. Alt+shift+w also works.
Thanks for your work.