It looks like there is a hard coded solution title in the binary available for download. During an upgrade we noticed that the solution title wasn't what we had set within our config. I checked through the source code
and everything looks fine.
 
So I loaded Setup.exe using reflector I can see the following:
 

Program::CreateProcessControl() : InstallProcessControl

 
internal static InstallProcessControl CreateProcessControl()
{

InstallProcessControl control = new InstallProcessControl();
control.Title = "Installing";
control.SubTitle = "Please wait while Ontolica is installed";
return control;

}

{
  InstallProcessControl control = new InstallProcessControl();
  control.Title = Resources.CommonUIStrings.controlTitleInstalling;
  control.SubTitle = Resources.CommonUIStrings.controlSubTitleInstalling;
  return control;
}