IE9 media queries and dropdown

 Hallo, I have some issue. In IE9 (Win7 32bit) if I have joined "config.contentsCSS" stylesheet with media queries ( @media only screen and (max-width: 480px) { #id table {...} } ) and click on CKEditor style or format toolbar dropdown, all tables are changed to previously defined media query style (and get back to correct style when use twice "display source" button). Maybe because width of dropdown item is less then 480px?