Brasero fail when done 95%

I wrote about 4, 3 GB into my DVD. The harddisk then had ~4.7GB free (for /tmp). The Brasero suddenly encountered error when it's nearly done writing my disc. I re-tried and lost 5 discs for it.
I then used Xfburn and succeeded.

The log of Brasero does not show much helpful info.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: brasero 2.32.1-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-11.47-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Fri Jul 22 21:07:30 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: brasero
UpgradeStatus: No upgrade log present (probably fresh install)