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Product Version = NetBeans IDE 7.3 (Build 201302132200) Operating System = Linux version 3.8.0-12-generic running on amd64 Java; VM; Vendor = 1.6.0_27 Runtime = OpenJDK 64-Bit Server VM 20.0-b12 when edit the css file. such as .heatmap path{fill:none;stroke:#000000;stroke-width:2px} the "fill", "stroke", "stroke-width" all of them shouldn't be unknown..
The css editor is not SVG aware right now. http://www.w3.org/TR/SVG/styling.html
BTW, you can add those to the ignore list - each warning have a hint fix for that. I'll try to address the SVG styling in next version. Thank you for the report!