update

Author: davidenke

dist/mdKeyboard.min.js

@@ -217,6 +217,8 @@ function useKeyboardDirective($mdKeyboard, $injector, $log, $rootScope) {
                         ngModelCtrl.$setViewValue((ngModelCtrl.$viewValue || '') + key[0]);
                         ngModelCtrl.$validate();
                         ngModelCtrl.$render();
+                        
+                        $scope.caps = false;
                 }
             }
 

src/css/mdKeyboard.css

@@ -23,7 +23,7 @@
                 </md-button>
             </span>
             <span ng-switch-when="Shift">
-                <md-button class="md-raised key-shift" ng-mousedown="pressed($event, key[0]); toggleCaps()" ng-mouseup="toggleCaps()" aria-label="{{key[0]}}">
+                <md-button class="md-raised key-shift" ng-mousedown="pressed($event, key[0]); toggleCaps()" aria-label="{{key[0]}}">
                     {{key[0]}}
                 </md-button>
             </span>