Chokes on IE filters

SCSS is unable to parse following constructs:

div { filter: alpha(opacity=85); }

or

div { filter:progid:DXImageTransform.Microsoft.Alpha(opacity=60); }

same for me
exception on

#menu {
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#f858ef', endColorstr='#ffe413', GradientType=1);
}

Same goes for me:

.foo {
  filter: alpha(opacity='0');
}

blows up complaining:

.foo {
^
Expected end of text (at char 0), (line:1, col:1)

Is there a workaround?

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