After installing IW 15.1.5 and recompiling TMS Intraweb Components I found that I can't set the visibility property of TTIWMulticolumnComboBox to False in my projects.
Everything was ok in IW 15.0.24.
I tried a new clean project, added MultiColumnComboBox and set the visibility to False. Nothing happens.
My Delphi version is XE5.