Index: branches/5.2.x/core/admin_templates/tools/system_tools.tpl
===================================================================
diff -u -N -r14926 -r15858
--- branches/5.2.x/core/admin_templates/tools/system_tools.tpl	(.../system_tools.tpl)	(revision 14926)
+++ branches/5.2.x/core/admin_templates/tools/system_tools.tpl	(.../system_tools.tpl)	(revision 15858)
@@ -239,7 +239,7 @@
 					function ($e) {
 						var $me = $(this);
 
-						$me.attr('disabled', 'disabled').removeClass('button').addClass('button-disabled');
+						$me.prop('disabled', true).removeClass('button').addClass('button-disabled');
 
 						$.post(
 							'<inp2:m_Link template="dummy" pass="m,adm" adm_event="OnMemoryCacheGet" js_escape="1" no_amp="1"/>',
@@ -258,7 +258,7 @@
 									alert($data.message);
 								}
 
-								$me.attr('disabled', '').addClass('button').removeClass('button-disabled');
+								$me.prop('disabled', false).addClass('button').removeClass('button-disabled');
 							}
 						);
 
@@ -278,7 +278,7 @@
 					function ($e) {
 						var $me = $(this);
 
-						$me.attr('disabled', 'disabled').removeClass('button').addClass('button-disabled');
+						$me.prop('disabled', true).removeClass('button').addClass('button-disabled');
 
 						$.post(
 							'<inp2:m_Link template="dummy" pass="m,adm" adm_event="OnMemoryCacheSet" js_escape="1" no_amp="1"/>',
@@ -296,7 +296,7 @@
 									alert($data.message);
 								}
 
-								$me.attr('disabled', '').addClass('button').removeClass('button-disabled');
+								$me.prop('disabled', false).addClass('button').removeClass('button-disabled');
 							}
 						);