diff --git a/themes/original/jquery/jquery-ui-1.8.custom.css b/themes/original/jquery/jquery-ui-1.8.custom.css
index b2ad14fe24..f9cc5b7807 100644
--- a/themes/original/jquery/jquery-ui-1.8.custom.css
+++ b/themes/original/jquery/jquery-ui-1.8.custom.css
@@ -414,7 +414,12 @@ button.ui-button::-moz-focus-inner { border: 0; padding: 0; } /* reset extra pad
 .ui-tabs .ui-tabs-nav li.ui-tabs-selected a, .ui-tabs .ui-tabs-nav li.ui-state-disabled a, .ui-tabs .ui-tabs-nav li.ui-state-processing a { cursor: text; }
 .ui-tabs .ui-tabs-nav li a, .ui-tabs.ui-tabs-collapsible .ui-tabs-nav li.ui-tabs-selected a { cursor: pointer; } /* first selector in group seems obsolete, but required to overcome bug in Opera applying cursor: text overall if defined elsewhere... */
 .ui-tabs .ui-tabs-panel { display: block; border: 0; padding: 1em 1.4em; background: none; }
-.ui-tabs .ui-tabs-hide { display: none !important; }
+/*.ui-tabs .ui-tabs-hide { display: none !important; }*/
+/* Firefox has issues rendering SVG in display:none elements. See also http://jqueryui.com/demos/tabs/#...my_slider.2C_Google_Map.2C_sIFR_etc._not_work_when_placed_in_a_hidden_.28inactive.29_tab.3F */
+.ui-tabs .ui-tabs-hide {
+    position: absolute;
+    left: -10000px;
+}
 /* Datepicker
 ----------------------------------*/
 .ui-datepicker { width: 17em; padding: .2em .2em 0; }
diff --git a/themes/pmahomme/jquery/jquery-ui-1.8.custom.css b/themes/pmahomme/jquery/jquery-ui-1.8.custom.css
index d6a599f41c..9946953858 100644
--- a/themes/pmahomme/jquery/jquery-ui-1.8.custom.css
+++ b/themes/pmahomme/jquery/jquery-ui-1.8.custom.css
@@ -414,7 +414,12 @@ button.ui-button::-moz-focus-inner { border: 0; padding: 0; } /* reset extra pad
 .ui-tabs .ui-tabs-nav li.ui-tabs-selected a, .ui-tabs .ui-tabs-nav li.ui-state-disabled a, .ui-tabs .ui-tabs-nav li.ui-state-processing a { cursor: text; }
 .ui-tabs .ui-tabs-nav li a, .ui-tabs.ui-tabs-collapsible .ui-tabs-nav li.ui-tabs-selected a { cursor: pointer; } /* first selector in group seems obsolete, but required to overcome bug in Opera applying cursor: text overall if defined elsewhere... */
 .ui-tabs .ui-tabs-panel { display: block; border: 0; padding: 1em 1.4em; background: none; }
-.ui-tabs .ui-tabs-hide { display: none !important; }
+/*.ui-tabs .ui-tabs-hide { display: none !important; }*/
+/* Firefox has issues rendering SVG in display:none elements. See also http://jqueryui.com/demos/tabs/#...my_slider.2C_Google_Map.2C_sIFR_etc._not_work_when_placed_in_a_hidden_.28inactive.29_tab.3F */
+.ui-tabs .ui-tabs-hide {
+    position: absolute;
+    left: -10000px;
+}
 /* Datepicker
 ----------------------------------*/
 .ui-datepicker { width: 17em; padding: .2em .2em 0; }