gistfile1.txt

in file.scss:
@import "tourbuzz-layout-images/*.png";   
@include all-tourbuzz-layout-images-sprites;
...
@media screen and (max-width: 1023px) {
  ...
  .main-nav-toggle { @include tourbuzz-layout-images-sprite(main-nav-toggle); }
}

generates err:
DEPRECATION WARNING on line 97 of tourbuzz-layout-images/*.png:
  @extending an outer selector from within @media is deprecated.
  You may only @extend selectors within the same directive.
  This will be an error in Sass 3.3.
  It can only work once @extend is supported natively in the browser.

syptoms:
1. my sprite file looks different than it did before (image order diff, maybe innocuous)
2. actual page shows wrong; no background-image directives
3. the spring png name changed (maybe this is normal; i'm new to maintaining this code)