Cherry picked commit 6e04d7b from #370.

Author: brianreavis

src/selectize.js

@@ -28,6 +28,7 @@ var Selectize = function($input, settings) {
 		isCmdDown        : false,
 		isCtrlDown       : false,
 		ignoreFocus      : false,
+		ignoreBlur       : false,
 		ignoreHover      : false,
 		hasOptions       : false,
 		currentResults   : null,
@@ -165,7 +166,7 @@ $.extend(Selectize.prototype, {
 			keypress  : function() { return self.onKeyPress.apply(self, arguments); },
 			resize    : function() { self.positionDropdown.apply(self, []); },
 			blur      : function() { return self.onBlur.apply(self, arguments); },
-			focus     : function() { return self.onFocus.apply(self, arguments); },
+			focus     : function() { self.ignoreBlur = false; return self.onFocus.apply(self, arguments); },
 			paste     : function() { return self.onPaste.apply(self, arguments); }
 		});
 
@@ -555,6 +556,14 @@ $.extend(Selectize.prototype, {
 		self.isFocused = false;
 		if (self.ignoreFocus) return;
 
+		// necessary to prevent IE closing the dropdown when the scrollbar is clicked
+		if (!self.ignoreBlur && document.activeElement === self.$dropdown_content[0]) {
+			self.ignoreBlur = true;
+			self.onFocus(e);
+
+			return;
+		}
+
 		if (self.settings.create && self.settings.createOnBlur) {
 			self.createItem(false);
 		}