I used TB 2 for years with no problems. Got stupid one day and upgraded to 24.2 on Mac OS 10.6.8. Now when I click send I get an error message. After dismissing the error clicking send a second time sends the email normally. The other half of the problem is Get Mail. Click it once and nothing happens except the little line on the bottom comes up connecting to .. . but it doesn't connect. Click Get Mail a second time and it works normally. I have a new Mac (Maverick) and TB 24.2 doesn't have this problem on the new machine.