TAdvInputTaskDialog and TAdvInputTaskDialogEX display strange shadows around the icon if the icon is set to to tiBlank and the Windows setting for Window color is not white. To reproduce this in Windows 7, go to Control Panel>Appearance and Personalization>Personalization and select WIndows Classic as the thene, Then use the Window Color dialog to set the color of Window to gray. Drop a TAdvInputTaskDialog or the EX version on a form and execute the dialog. You will see a shadow where the icon would be.
We fixed this. Next update should address this.