Richfaces rendering fails on Arabic Windows environment.
Richfaces should handle Arabic Locale while doing Number Formatting.

StackTrace :

java.lang.IllegalArgumentException: Parameter "size" for convert from HTML to java can not be decoded: [11px], reason: Unparseable number: "11px"
at org.ajax4jsf.util.HtmlDimensions.decode(HtmlDimensions.java:65)
at org.richfaces.renderkit.html.images.BaseControlBackgroundImage.getHeight(BaseControlBackgroundImage.java:80)
at org.richfaces.renderkit.html.images.BaseControlBackgroundImage.getHeight(BaseControlBackgroundImage.java:87)
at org.richfaces.renderkit.html.images.BaseControlBackgroundImage.saveData(BaseControlBackgroundImage.java:105)
at org.richfaces.renderkit.html.BaseGradient.getDataToStore(BaseGradient.java:289)
at org.ajax4jsf.resource.InternetResourceBase.getUri(InternetResourceBase.java:218)
at org.ajax4jsf.renderkit.compiler.ResourceElement.getString(ResourceElement.java:114)
at org.ajax4jsf.renderkit.compiler.ClassElement.getString(ClassElement.java:94)
at org.ajax4jsf.renderkit.compiler.ClassElement.encode(ClassElement.java:59)