Freaduino Mega2560 avrdude verification error on 3.3V

When I am uploading sketches to the “Freaduino MEGA 2560” I get an error message like the following: “avrdude: verification error, first mismatch at byte 0x1c28 0xfa != 0x7a”. This only happens when I/O voltage switch is set to 3.3V. If board switch is set to 5V I/O, it uploads without the error message. It happens with several boards, on any sketch. The code seems to be uploaded, but I do not like to get such an error message. Any suggestions ?)

Hey Kevin, which sketches are you uploading? And are you using the standard Arduino IDE?