app/assets/stylesheets/settings/functions/_background.sass in oulu-0.12.31 vs app/assets/stylesheets/settings/functions/_background.sass in oulu-0.12.32

@@ -32,10 +32,10 @@
 
 @function background_size_value($value)
   @if background_size($value)
     @if list($value)
       @if string(nth($value, 1)) and str-index(nth($value, 1), '\/')
-        @return unquote(str-replace(nth($value, 1), '\\/', '/') + ' ' + nth($value, 2))
+        @return unquote(string-replace(nth($value, 1), '\\/', '/') + ' ' + nth($value, 2))
       @else
         @return unquote('/' + $value)
     @else
       @return  unquote('/' + $value)
   @else