Mesas redondas en Twitter Bootstrap 3

"table-responsive" va en un div que envuelve la mesa, no en la propia mesa.

En normalizar.menos existe la tabla reset que incluye border-collapse: collapse. Esto no estaba en el 2.x de Bootstrap. Debido a este nuevo reinicio, no hay esquinas redondeadas, ya que tienen que ser border-collapse:separate. Tienes que hacer una clase separada y configurarla en consecuencia.

       <table class="table table-curved">

Solo funciona con "table-hover" y "table-striped", NO con bordes de mesa. Las fronteras están incluidas en este estilo.

.table-curved {
    border-collapse: separate;
}
.table-curved {
    border: solid #ccc 1px;
    border-radius: 6px;
    border-left:0px;
}
.table-curved td, .table-curved th {
    border-left: 1px solid #ccc;
    border-top: 1px solid #ccc;
}
.table-curved th {
    border-top: none;
}
.table-curved th:first-child {
    border-radius: 6px 0 0 0;
}
.table-curved th:last-child {
    border-radius: 0 6px 0 0;
}
.table-curved th:only-child{
    border-radius: 6px 6px 0 0;
}
.table-curved tr:last-child td:first-child {
    border-radius: 0 0 0 6px;
}
.table-curved tr:last-child td:last-child {
    border-radius: 0 0 6px 0;
}

MENOS

  //  Added Rounded Corner Tables 
.table-curved {
  border-collapse: separate;
  border: solid @table-border-color 1px;
  border-radius: @table-radius;
  border-left:0px;

    td, th {
      border-left: 1px solid @table-border-color;
      border-top: 1px solid @table-border-color;
    }

    th {
      border-top: none;
    }

    th:first-child {
      border-radius: @table-radius 0 0 0;
    }

    th:last-child {
      border-radius: 0 @table-radius 0 0;
    }

    th:only-child{
      border-radius: @table-radius @table-radius 0 0;
    }

    tr:last-child td:first-child {
      border-radius: 0 0 0 @table-radius;
    }

    tr:last-child td:last-child {
      border-radius: 0 0 @table-radius 0;
    }
}

Usando la respuesta de Christina y este hilo , se me ocurrió este CSS para obtener las esquinas redondeadas en las tablas con o sin THEAD.

.table-curved {
   border-collapse: separate;
   border: solid #ccc 1px;
   border-radius: 6px;
   border-left: 0px;
   border-top: 0px;
}
.table-curved > thead:first-child > tr:first-child > th {
    border-bottom: 0px;
    border-top: solid #ccc 1px;
}
.table-curved td, .table-curved th {
    border-left: 1px solid #ccc;
    border-top: 1px solid #ccc;
}
.table-curved > :first-child > :first-child > :first-child {
    border-radius: 6px 0 0 0;
}
.table-curved > :first-child > :first-child > :last-child {
    border-radius: 0 6px 0 0;
}
.table-curved > :last-child > :last-child > :first-child {
    border-radius: 0 0 0 6px;
}
.table-curved > :last-child > :last-child > :last-child {
    border-radius: 0 0 6px 0;
}

Asumo que no está utilizando los archivos fuente less. Sin embargo, en normalizar.less, bootstrap 3.0 RC está agregando:

// ==========================================================================
// Tables
// ==========================================================================

//
// Remove most spacing between table cells.
//

table {
  border-collapse: collapse;
  border-spacing: 0;
}

Esta cosa de colapso de bordes destruye los bordes redondeados en las tablas. Por lo tanto, simplemente anulando eso en su mesa bordeada, activa el efecto:

.table-bordered
{
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;

    border-collapse: inherit;
}

Creo que puede funcionar.

Por el bien de bootstrappiness:

.table-curved {
    border-collapse: separate;
    border: solid @table-border-color 1px;
    border-radius: @border-radius-base;
    border-left: 0px;
    border-top: 0px;
    > thead:first-child > tr:first-child > th {
        border-bottom: 0px;
        border-top: solid @table-border-color 1px;
    }
    td, th {
        border-left: 1px solid @table-border-color;
        border-top: 1px solid @table-border-color;
    }
    > :first-child > :first-child > :first-child {
        border-radius: @border-radius-base 0 0 0;
    }
    > :first-child > :first-child > :last-child {
        border-radius: 0 @border-radius-base 0 0;
    }
    > :last-child > :last-child > :first-child {
        border-radius: 0 0 0 @border-radius-base;
    }
    > :last-child > :last-child > :last-child {
        border-radius: 0 0 @border-radius-base 0;
    }
}

El siguiente funciona bastante bien para mí:

.table-curved {
    border-collapse: separate;
}
.table-curved {
    border: solid #ccc 1px;
    border-radius: 6px;
}
.table-curved td, .table-curved th {
    border-left: 1px solid #ccc;
    border-top: 1px solid #ccc;
}
.table-curved tr > *:first-child {
    border-left: 0px;
}
.table-curved tr:first-child > * {
    border-top: 0px;
}

Aunque por supuesto no funciona para tablas anidadas.

Si solo tiene 1 celda en la primera fila o la última fila, esta funcionará.

(Se ha añadido una corrección al código de: Ruben Stolk)

.table-curved {
  border-collapse: separate;
  border: solid @table-border-color 1px;
  border-radius: @border-radius-base;
  border-left: 0px;
  border-top: 0px;
  > thead:first-child > tr:first-child > th {
    border-bottom: 0px;
    border-top: solid @table-border-color 1px;
  }
  td, th {
    border-left: 1px solid @table-border-color;
    border-top: 1px solid @table-border-color;
  }
  > :first-child > :first-child > :first-child {
    border-radius: @border-radius-base 0 0 0;
  }
  > :first-child > :first-child > :last-child {
    border-radius: 0 @border-radius-base 0 0;
  }
  > :first-child > :first-child > :only-child{
    border-radius: @border-radius-base @border-radius-base 0 0;
  }
  > :last-child > :last-child > :first-child {
    border-radius: 0 0 0 @border-radius-base;
  }
  > :last-child > :last-child > :last-child {
    border-radius: 0 0 @border-radius-base 0;
  }
  > :last-child > :last-child > :only-child{
    border-radius: 0 0 @border-radius-base @border-radius-base;
  }
}

La respuesta anterior sobre envolver la tabla con un panel (<div class="panel panel-default">) parece funcionar mejor.

Sin embargo, como se mencionó en los comentarios, es necesario eliminar el borde superior de la tabla.

Usé este SCSS para hacer esto, así que pensé en compartir:

// remove extra top border on tables wrapped in a panel
.panel {
  & > .table-responsive > .table.table-bordered, & > .table.table-bordered {
    & > tbody:first-child, & > thead:first-child {
      & > tr:first-child {
        td, th {
          border-top: none;
        }
      }
    }
  }
}

Esta es otra solución que puede ser mucho más simple que las anteriores. Esto seleccionará el primer y último elemento th y aplicará un borde a sus respectivas esquinas. A continuación, puede agregar un radio a la tabla general.

.table {
  border-radius: 5px;
}
th:first-of-type {
  border-top-left-radius: 5px;
}
th:last-of-type {
  border-top-right-radius: 5px;
}

Use table-bordered-curved en su lugar table-bordered

.table-bordered-curved {
    border-radius: 4px;
    border-collapse: separate;
    border: solid 1px #ccc;
}

.table-bordered-curved thead tr:last-child th,
.table-bordered-curved thead tr:last-child td {
    border-bottom: solid 1px #ccc;
}

.table-bordered-curved thead tr th,
.table-bordered-curved thead tr td {
    border-bottom: 0;
    border-right: solid 1px #ccc;
}

.table-bordered-curved thead tr th:last-child,
.table-bordered-curved thead tr td:last-child {
    border-right: 0;
}

.table-bordered-curved tbody tr:first-child th,
.table-bordered-curved tbody tr:first-child td {
    border-top: 0;
}

.table-bordered-curved tbody tr td {
    border-right: solid 1px #ccc;
}

.table-bordered-curved tbody tr td:last-child {
    border-right: 0;
}