Delphi 2010 button with Windows version that has Aero glass on turns text white

Question

The other day, I started to play with different visual effects in Delphi, and ran into a problem using Aero Glass effect (I have a Delphi 2010 installed): when I put the button on the glass, some part of this button (or some other element) burns and becomes transparent. I don't know why, but I tried to do the same example on the other computers. And this bug repeated.

Screenshot with a bug; the second button's caption is transparent:

My example program:

program Project1;

uses
  Forms,
  Unit1 in 'Unit1.pas' {Form1};

{$R *.res}

begin
  Application.Initialize;
  Application.MainFormOnTaskbar := True;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.

---

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

end.
object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 202
  ClientWidth = 331
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  GlassFrame.Enabled = True
  GlassFrame.Bottom = 50
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 64
    Top = 153
    Width = 175
    Height = 41
    Caption = 'Button1'
    Font.Charset = DEFAULT_CHARSET
    Font.Color = clMenuHighlight
    Font.Height = -11
    Font.Name = 'Tahoma'
    Font.Style = []
    ParentFont = False
    TabOrder = 0
  end
  object Button2: TButton
    Left = 64
    Top = 73
    Width = 175
    Height = 41
    Caption = 'Button1'
    Font.Charset = DEFAULT_CHARSET
    Font.Color = clMenuHighlight
    Font.Height = -11
    Font.Name = 'Tahoma'
    Font.Style = []
    ParentFont = False
    TabOrder = 1
  end
end

Answer 1

This is a known bug in Delphi 2010 support for "glass" (Aero Composition using DWM), I believe it was fixed in Delphi XE, and the workaround that I chose to use is to use my own custom TButton-like class.

I reported this bug to Embarcadero when I saw it in 2010, as did others, I can't seem to find the QC# (bug report #), but the suggested workaround with double-buffered is not acceptable to me. TBitBtn did not exhibit this problem I believe and was my simplest workaround, although it had other issues.

There are a lot of glass issues in Delphi 2010. General advice; Upgrade Delphi.