I was comparing changes to a .dfm that I only changed the border icon for the form for. I noticed additional changes to the TAdvTreeComboBox that I didn't make. Three things changed:
Original:
Width = 330
Version = '1.2.6.3'
ExplicitWidth = 326
New:
Width = 326
Version = '1.2.6.5'
ExplicitWidth = 322
I note that it looks like something used the ExplicitWidth to set the Width which then caused the control to be resized all by itself?