Does none else has the same problem?
Sometimes I´m creating a .d64, copying stuff into it by using a 1541 II on #9, with Fast Hackem, Action Replay Backup or Filecopy etc.
After copying the stuff I´m going back to TC´s Main Menu, I answer "Disk Image(s) have changed" with "update" and then... my .d64 has no longer the correct 174848 Bytes! It´s getting bigger, the actual Test-Image has 183044 Bytes and can´t be mounted anymore, due "UNSUPPORTED D64 IMAGE SIZE"...!
So some Disks are able to be copied, some aren´t, no matter how often I try.