you can't backspace in your signature space. I have messed up mine and now can't fix it at all. you were able to highlight your old signature and then re-write it. however if you filled all 80 characters and messed up as I did it locks in and you can't change it.
thanks for all the the great work you have done to bring back VMK as MyVMK
thanks for all the the great work you have done to bring back VMK as MyVMK