| Index: pkg/polymer/lib/src/js/polymer/layout.html | 
| diff --git a/pkg/polymer/lib/src/js/polymer/layout.html b/pkg/polymer/lib/src/js/polymer/layout.html | 
| index 4e1284b9c15ac6401bac55233b364823e70ab8da..679738b16dfe9d139798d535acc07664e35fbce6 100644 | 
| --- a/pkg/polymer/lib/src/js/polymer/layout.html | 
| +++ b/pkg/polymer/lib/src/js/polymer/layout.html | 
| @@ -237,7 +237,7 @@ html /deep/ [block] { | 
|  | 
| /* ie support for hidden */ | 
| html /deep/ [hidden] { | 
| -  display: none; | 
| +  display: none !important; | 
| } | 
|  | 
| html /deep/ [relative] { | 
|  |