Ribbon button EnabledScript not working

Question

Custom Ribbon controls EnabledScript no longer works due to a change in sp.ribbon.js.
In one environment, it is using an older version of the script and it works.  In another environment, there is a more recent script version and the button EnabledScript does not run.
I found a difference between old and new in sp.ribbon.js (starting at line 246):
OLD:
if (!SP.Ribbon.SU.$0($v_1) && $v_1.toLowerCase().startsWith("javascript:")) {
           window.g_CUIcommandId = $p1;
           var $v_5 = eval($p0.EnabledScript);
           window.g_CUIcommandId = null;
           return $v_5
NEW:
if (!$v_4 && !SP.Ribbon.SU.$0($v_1) && $v_1.toLowerCase().startsWith("javascript:")) {
  window.g_CUIcommandId = $p1;
  var $v_8 = eval($p0.EnabledScript);
  window.g_CUIcommandId = null;
  return $v_8
The $v_4 is true, causing my script to not run.  Here
is additional information (from sp.debug.js) that was added to the new script:
var $v_2 = $p0.CommandAction;
var $v_3 = !SP.Ribbon.SU.$0($v_2) && $v_2.startsWith('javascript:LaunchApp(');
var $v_4 = $v_3 && !SP.PageContextInfo.get_isAppWeb();

Answer 1

Hi Jeff,
I saw your post on
http://community.office365.com/en-us/f/154/t/252409.aspx and i am also experiencing the same in my app since last week(earlier it was working fine). As this seems to be caused by some Microsoft update, any idea if they will be releasing another
patch to fix this problem.
Thanks in advance.
Akshat