avrdude: verification error, first mismatch at byte 0x44de

Just soldered on a new PCB and i get this error after the upload is complete. Tried running Blinky and it works well.

The hex part of the error keeps changing every time a sketch is uploaded. I guess the uploaded sketch works but for some reason an error occurs during verification.

Has anyone got any idea how i can over come this ?

Tell us much more about your project. Which CPU? Schematics of the board? What programmer do you use? Which version of the IDE are you using? Post the complete output you get (don't forget the code tags!).

The hex part of the error keeps changing every time a sketch is uploaded. I guess the uploaded sketch works but for some reason an error occurs during verification.

I would have doubts if it works. Try to read out the image manually from the memory and compare it.