--- a/static/bootstrap/less/responsive-utilities.less	Wed Dec 11 21:51:51 2013 -0800
+++ b/static/bootstrap/less/responsive-utilities.less	Thu Dec 12 21:54:04 2013 -0800
@@ -3,57 +3,207 @@
 // --------------------------------------------------
 
 
-// IE10 Metro responsive
-// Required for Windows 8 Metro split-screen snapping with IE10
+// IE10 in Windows (Phone) 8
+//
+// Support for responsive views via media queries is kind of borked in IE10, for
+// Surface/desktop in split view and for Windows Phone 8. This particular fix
+// must be accompanied by a snippet of JavaScript to sniff the user agent and
+// apply some conditional CSS to *only* the Surface/desktop Windows 8. Look at
+// our Getting Started page for more information on this bug.
+//
+// For more information, see the following:
+//
+// Issue: https://github.com/twbs/bootstrap/issues/10497
+// Docs: http://getbootstrap.com/getting-started/#browsers
 // Source: http://timkadlec.com/2012/10/ie10-snap-mode-and-responsive-design/
-@-ms-viewport{
+
+@-ms-viewport {
   width: device-width;
 }
 
-// Hide from screenreaders and browsers
-// Credit: HTML5 Boilerplate
-.hidden {
-  display: none;
-  visibility: hidden;
-}
 
 // Visibility utilities
 
-// For desktops
-.visible-phone     { display: none !important; }
-.visible-tablet    { display: none !important; }
-.hidden-phone      { }
-.hidden-tablet     { }
-.hidden-desktop    { display: none !important; }
-.visible-desktop   { display: inherit !important; }
-
-// Tablets & small desktops only
-@media (min-width: 768px) and (max-width: 979px) {
-  // Hide everything else
-  .hidden-desktop    { display: inherit !important; }
-  .visible-desktop   { display: none !important ; }
-  // Show
-  .visible-tablet    { display: inherit !important; }
-  // Hide
-  .hidden-tablet     { display: none !important; }
+.visible-xs {
+  .responsive-invisibility();
+  @media (max-width: @screen-xs-max) {
+    .responsive-visibility();
+  }
+  &.visible-sm {
+    @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+      .responsive-visibility();
+    }
+  }
+  &.visible-md {
+    @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+      .responsive-visibility();
+    }
+  }
+  &.visible-lg {
+    @media (min-width: @screen-lg-min) {
+      .responsive-visibility();
+    }
+  }
+}
+.visible-sm {
+  .responsive-invisibility();
+  &.visible-xs {
+    @media (max-width: @screen-xs-max) {
+      .responsive-visibility();
+    }
+  }
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    .responsive-visibility();
+  }
+  &.visible-md {
+    @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+      .responsive-visibility();
+    }
+  }
+  &.visible-lg {
+    @media (min-width: @screen-lg-min) {
+      .responsive-visibility();
+    }
+  }
+}
+.visible-md {
+  .responsive-invisibility();
+  &.visible-xs {
+    @media (max-width: @screen-xs-max) {
+      .responsive-visibility();
+    }
+  }
+  &.visible-sm {
+    @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+      .responsive-visibility();
+    }
+  }
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    .responsive-visibility();
+  }
+  &.visible-lg {
+    @media (min-width: @screen-lg-min) {
+      .responsive-visibility();
+    }
+  }
+}
+.visible-lg {
+  .responsive-invisibility();
+  &.visible-xs {
+    @media (max-width: @screen-xs-max) {
+      .responsive-visibility();
+    }
+  }
+  &.visible-sm {
+    @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+      .responsive-visibility();
+    }
+  }
+  &.visible-md {
+    @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+      .responsive-visibility();
+    }
+  }
+  @media (min-width: @screen-lg-min) {
+    .responsive-visibility();
+  }
 }
 
-// Phones only
-@media (max-width: 767px) {
-  // Hide everything else
-  .hidden-desktop    { display: inherit !important; }
-  .visible-desktop   { display: none !important; }
-  // Show
-  .visible-phone     { display: inherit !important; } // Use inherit to restore previous behavior
-  // Hide
-  .hidden-phone      { display: none !important; }
+.hidden-xs {
+  .responsive-visibility();
+  @media (max-width: @screen-xs-max) {
+    .responsive-invisibility();
+  }
+  &.hidden-sm {
+    @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+      .responsive-invisibility();
+    }
+  }
+  &.hidden-md {
+    @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+      .responsive-invisibility();
+    }
+  }
+  &.hidden-lg {
+    @media (min-width: @screen-lg-min) {
+      .responsive-invisibility();
+    }
+  }
+}
+.hidden-sm {
+  .responsive-visibility();
+  &.hidden-xs {
+    @media (max-width: @screen-xs-max) {
+      .responsive-invisibility();
+    }
+  }
+  @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+    .responsive-invisibility();
+  }
+  &.hidden-md {
+    @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+      .responsive-invisibility();
+    }
+  }
+  &.hidden-lg {
+    @media (min-width: @screen-lg-min) {
+      .responsive-invisibility();
+    }
+  }
+}
+.hidden-md {
+  .responsive-visibility();
+  &.hidden-xs {
+    @media (max-width: @screen-xs-max) {
+      .responsive-invisibility();
+    }
+  }
+  &.hidden-sm {
+    @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+      .responsive-invisibility();
+    }
+  }
+  @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+    .responsive-invisibility();
+  }
+  &.hidden-lg {
+    @media (min-width: @screen-lg-min) {
+      .responsive-invisibility();
+    }
+  }
+}
+.hidden-lg {
+  .responsive-visibility();
+  &.hidden-xs {
+    @media (max-width: @screen-xs-max) {
+      .responsive-invisibility();
+    }
+  }
+  &.hidden-sm {
+    @media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) {
+      .responsive-invisibility();
+    }
+  }
+  &.hidden-md {
+    @media (min-width: @screen-md-min) and (max-width: @screen-md-max) {
+      .responsive-invisibility();
+    }
+  }
+  @media (min-width: @screen-lg-min) {
+    .responsive-invisibility();
+  }
 }
 
 // Print utilities
-.visible-print    { display: none !important; }
-.hidden-print     { }
+.visible-print {
+  .responsive-invisibility();
+}
 
 @media print {
-  .visible-print  { display: inherit !important; }
-  .hidden-print   { display: none !important; }
+  .visible-print {
+    .responsive-visibility();
+  }
+  .hidden-print {
+    .responsive-invisibility();
+  }
 }