I noticed that on postbackup all output is put in the $err_logfile file.
Then it says that the backup = failed because it has output from the script in it :D
I fixed it myself by backing the file up in the postbackup script then copying it back when exit=0 after the post backup.
But i can imagine that it shoud work normaly and display the output of the postbackup script instead of a failed message.
great work on the script i really love it!