@JP36: I also saw that line. I think it appeared after updating to the new firmware. I also guessed it was software related as I did not see it always. In any case it was very different from the vertical line on my panel.
@Rezz: did you send an email to service@pocketbook.de ? I am not sure in which country you are located. I needed to send mine to Nürnberg (I could give you the address but it is probably better you wait for them to answer). Mine was delivered there yesterday but I guess it will take them some time to check it.
Meanwhile I moved back to Shanghai so I am wondering how I am going to get it here