menu problemas en navegadores actualizados

[emprear]

Mi primer recomendación es que arregles tu html, para empezar, un <div> dentro del head?

Result: 158 errors / 0 warnings

line 6 column 20 - Error: document type does not allow element "div" here; assuming missing "object" start-tag
line 6 column 177 - Error: document type does not allow element "title" here
line 7 column 172 - Error: document type does not allow element "meta" here
line 8 column 264 - Error: document type does not allow element "meta" here
line 10 column 61 - Error: document type does not allow element "meta" here
line 11 column 68 - Error: document type does not allow element "meta" here
line 12 column 59 - Error: document type does not allow element "meta" here
line 13 column 47 - Error: document type does not allow element "meta" here
line 49 column 7 - Error: end tag for "object" omitted, but OMITTAG NO was specified
line 6 - Info: start tag was here
line 49 column 7 - Error: end tag for "head" which is not finished
line 49 column 101 - Error: document type does not allow element "script" here; assuming missing "body" start-tag
line 91 column 22 - Error: document type does not allow element "style" here
line 135 column 56 - Error: end tag for "br" omitted, but OMITTAG NO was specified
line 135 column 52 - Info: start tag was here
line 141 column 6 - Error: required attribute "type" not specified
line 141 column 6 - Error: document type does not allow element "style" here
line 152 column 5 - Error: document type does not allow element "body" here
line 156 column 150 - Error: required attribute "alt" not specified
line 157 column 158 - Error: required attribute "alt" not specified
line 158 column 163 - Error: required attribute "alt" not specified
line 282 column 19 - Error: ID "zona_game" already defined
line 280 column 31 - Info: ID "zona_game" first defined here
line 282 column 72 - Error: end tag for element "H3" which is not open
line 282 column 226 - Error: required attribute "alt" not specified
line 282 column 230 - Error: end tag for "img" omitted, but OMITTAG NO was specified
line 282 column 165 - Info: start tag was here
line 282 column 236 - Error: end tag for "h3" omitted, but OMITTAG NO was specified
line 282 column 48 - Info: start tag was here
line 285 column 45 - Error: end tag for element "H3" which is not open
line 285 column 51 - Error: end tag for "h3" omitted, but OMITTAG NO was specified

son tan solo una muestra