Xfburn in Dapper cannot burn an Iso file from USB drive

Thank you for reporting this bug. I can recreate this issue, thus, I'm changing the status to Confirmed and Importance to Low since there is an existing workaround.
Workaround is to copy the ISO to the hard disk and burn it from there.
If you have any other concerns, please don't hesitate to comment on this bug.

Do you still have this issue using xfburn in Xubuntu Feisty ?

I haven't upgraded Xubuntu in the PC. (I suppose I would have to do clean install since the graphichs adapter Matrox G450 does not work in Edgy, see https://bugs.launchpad.net/edgy-backports/+bug/58721.)

Ok thank you, I'm leaving this as new until someone can confirm on Fiesty/Gutsy.

Gutsy included Brasero as the default cd burning application, as burning ISO's in xfburn didn't work. Is it possible for the users to install brasero from the dapper repositories? If not, graveman is an alternate suitable application.

I would not normally suggest that a user install a different application to work-around a bug, but xfburn application development is not addressing this issue.

Could you possibly try to reproduce this xfburn from svn ? xfburn has been updated to use modern libs, it shouldn't crash now.

I am not used to install applications from svn. How do you do it?

If you use gutsy, you can grab libisofs and libburn on my ppa: https://launchpad.net/~jerome-guelfucci/+archive

First install all the deps needed: xfce4-dev-tools, libisofs-dev, libburn-dev, libgtk2.0-dev, libglib2.0-dev, libxfcegui4-dev, libexo-0.3-dev, libthunar-vfs-1-dev
I also advise to install build-essential and checkinstall to have all build tools and easily install from sources.

Then grab source from trunk: svn co http://svn.xfce.org/svn/goodies/xfburn/trunk
Then enter the following commands:
  cd trunk
  ./autogen.sh
  make
  sudo checkinstall

In checkinstall, enter "n" for documentation pack and "0.3.0~svn1" for version of the package. By default it also wants to name the package "trunk". To modify the names to xfburn, when it says :

"Enter a number to change any of them or press ENTER to continue:" enter 2, and then add xfburn as new name.

Then it should build and install a new debian package which you will be abale to remove with apt-get/aptitude/synaptic...

Thank you for your tests !

Should I be in home directory when giving the svn command? I couldn't find libisofs-dev.

You can be in any folder, this command will just create a new folder names trunk and download there the sources of xfburn. libisofs-dev is available on my ppa, just click on the arrow near libisofs and select there correct architecture. You can also add my ppa to your sources.list to grab all dependencies easily.

Burning image from USB Flash drive using Xfburn 0.3.0~svn1-1 worked. (Burning was slow, though. Maybe it didn't take the desired 4x speed because of the small size of the ISO, 2MB)

Ok, thank you very much for your tests !

As stated above, it'll be fixed when xfburn 0.3.0 is synced from debian unstable (Bug #240061).