[Bug 385540] [NEW] Brasero calculates wrong checksum after burn ISO to CD

[MestreLion]

Public bug reported:

Binary package hint: brasero

After burning a CD from an ISO file, Brasero reports an error saying
checksum from ISO file and burned CD do not match. ("Some files may be
corrupted on the disc").

However, CD is fine and all files were burned correctly. I did a manual
verification using md5sum on both the ISO and on the burned CD, and they
DO match.

Steps to reproduce:
- In Nautilus, right-click an .ISO file (i used ubuntu-9.04-desktop-i386.iso) and select "Write to Disc". 
- Click "Burn"

After recording, it says "Some files may be corrupted on the disc".

Opening up the logfile, near the end theres the line that triggered the
error:

BraseroChecksumImage Setting new checksum (type = 2)
2602036235674bdd37d297dadd7547dd (66fa77789c7b8ff63130e5d5a272d67b
before)

Steps to Verify:
- Check the ISO hash: md5sum ubuntu-9.04-desktop-i386.iso
( it says 66fa77789c7b8ff63130e5d5a272d67b, same checksum as in Ubuntu documentation https://help.ubuntu.com/community/UbuntuHashes )
- Check the CD hash: md5sum /media/cdrom (again, 66fa77789c7b8ff63130e5d5a272d67b)
- Create ISO from CD using Brasero, and then check md5sum: 66fa77789c7b8ff63130e5d5a272d67b

So Brasero, for some reason, is not calculating the burned CD checksum
correctly.

I tried with the same ISO twice, and then with another ISO (the one i am
attaching). The 3 discs were OK but in all Brasero reported this error.

PS: This is my 1st bug report, im new to Ubuntu, so I apologize theres
anything incorrect in the report format.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/brasero
NonfreeKernelModules: nvidia
Package: brasero 2.26.1-0ubuntu1
ProcEnviron:
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: brasero
Uname: Linux 2.6.28-11-generic i686

** Affects: brasero (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386

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Brasero calculates wrong checksum after burn ISO to CD
https://bugs.launchpad.net/bugs/385540
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