Recently when I go to save an edit change for either an Item or Category, I get the following notice:

"Notice: Undefined index: in C:\xampp\joomla32\administrator\templates\isis\html\message.php on line 24"

The edit changes do seem to get saved, but it takes longer than normal to refresh the editor page and then the above notice appears.
I am using Joomla 3.2/K2 v2.6.7 with isis template as default for administrator. Does not happen when editing in basic Joomla articles or categories - only in K2. Have reinstalled K2 but did not help. Checked the message.php and it has not changed since original K2 install.

Hi. You need to update K2.