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I'm seeing tasks at the error level in my "Tasks" pane for css such as "div.component-tools { filter:alpha(opacity=50); opacity:0.5; display:block; }" in a css file. The message is 'Unexpected symbol(s) found: "="' and the = between opacity and 50 is underlined with red. This is the IE way of setting opacity in css and I think it should not show as an error.
*** Issue 170092 has been marked as a duplicate of this issue. ***
reproducible
*** This issue has been marked as a duplicate of 110333 ***