How to burn a 6.8GB ISO onto a DVD-R DL media

Hi K3b support:

I'm using K3b version 1.0.3 to burn a 6.8GB iso onto a DVD-R DL disc.
The burn fails within 8 seconds. The burn window shows the error. Here
are the messages in that window:

  Using growisofs 7.0 - Copyright bla bla bla
  Starting disc write...
  OPC failed. Please try writing speed 1x.
  Writing speed: 5678 KB/s (4.10x)
  Write error

That statement of "Please try writing speed 1x" is a bit puzzling
since there is no 1x selection in the burn dialog box (I verified that
by a second attempt on the same disc).

The debugging log contains the following:

  System
  -----------------------
  K3b Version: 1.0.3

  KDE Version: 3.5.8-7.fc7 Fedora
  QT Version:  3.3.8
  Kernel:      2.6.23.12-52.fc7
  Devices
  -----------------------
  PLEXTOR DVDR   PX-740A 1.01 (/dev/sr0, ) [CD-R, CD-RW, CD-ROM,
DVD-ROM, DVD-R, DVD-RW, DVD-R DL, DVD+R, DVD+RW, DVD+R DL] [DVD-ROM,
DVD-R Sequential, DVD-R Dual Layer Sequential, DVD-R Dual Layer Jump,
DVD-RW Restricted Overwrite, DVD-RW Sequential, DVD+RW, DVD+R, DVD+R
Dual Layer, CD-ROM, CD-R, CD-RW] [SAO, TAO, RAW, SAO/R96R, RAW/R16,
RAW/R96R, Restricted Overwrite, Layer Jump]

  Burned media
  -----------------------
  DVD-R Dual Layer Sequential

  Used versions
  -----------------------
  growisofs: 7.0

  growisofs
  -----------------------
  Executing 'builtin_dd if=/dev/fd/0 of=/dev/sr0 obs=32k seek=0'
  :-[ PERFORM OPC failed with SK=3h/ASC=11h/ACQ=00h]: Input/output error
  /dev/sr0: "Current Write Speed" is 4.1x1352KBps.
  :-[ WRITE@LBA=0h failed with SK=3h/ASC=0Ch/ACQ=00h]: Input/output error
  :-( write failed: Input/output error

  growisofs command:
  -----------------------
  /usr/bin/growisofs -Z /dev/sr0=/dev/fd/0 -use-the-force-luke=notray
-use-the-force-luke=tty -use-the-force-luke=tracksize:3570944
-dvd-compat -speed=4 -use-the-force-luke=bufsize:32m

The package of media says:

  8.5GB "Dual Layer" 4X

Is this a problem with >2GB ISO's? Is it a problem with some
underlying software that K3b expects to be able to handle DVD-R DL
discs?  Is version 1.0.3 not up to the task and I must upgrade to
1.0.4?

Thanks,
Brent

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