Created attachment 13601 [details]
visual studio solution and screen shot in Windows and Linux
HOW TO REPRODUCE:
* create new project of windows form application
* add TextBox control
* enlarge the control has sufficient text margin
* add line (textBox1.Text = "ABC" + "\t" + "123" + "\t" + "DEF";) in Form1_Load
This application can show correctly in Windows, but can not in Linux.