If anyone is using my previous override and needs docked items, I think this works. The only thing is you might need to explicitly set width on tips that actually use dock (like close button, etc).

  delete Ext.tip.Tip.prototype.minWidth;
  if(Ext.isIE10) { 
   Ext.override(Ext.tip.Tip, {
    componentLayout: {
     type: 'dock',
     usesContentWidth: false
Still waiting for any sort of help from Sencha on this...