Return json not working in $. ajax

[dioubernardo]

javascript code: $.post("url ...", "parametros=1", function(d){

alert(d)

}, 'json');

php return: {p:"",r:"<tr><td>cmsMenu</td><td><i class=\"ico i8\"></i> CMS - Menu Base</td><td class=\"op\"><a class=\"ico i1\" href=\"/saite/cms/menus/editar/1\"></a><a class=\"ico i2\" href=\"/saite/cms/menus/delete/1\"></a></td></tr><tr><td>cmsConteudos</td><td><i class=\"ico i8\"></i> CMS - Menu Conteúdos</td><td class=\"op\"><a class=\"ico i1\" href=\"/saite/cms/menus/editar/2\"></a><a class=\"ico i2\" href=\"/saite/cms/menus/delete/2\"></a></td></tr>"}

the alert is not called. Before upgrading to jquery 1.4 worked.

sorry for my English if in code javascript replace 'json' by 'text' then the alert is show.

[dmethvin]

The server must produce valid json.

VALID: {"test": "string"} INVALID: { test: "string"} INVALID: { 'test': "string"} INVALID: { "test"": 'string'}

[anonymous]

THANKS A MILLION dmethvin After 3 days of useless efforts you came in and saved me

[anonymous]

Really the code is invalid json ​http://www.ietf.org/rfc/rfc4627.txt

The only question is to stop working