Volume jumps from quiet to max

Binary package hint: indicator-sound

My sound-control applet only allows quiet or maximum volume. There are only three steps from quiet to maximum volume. I've also found someone describing this bug on ubuntuforums.org: http://ubuntuforums.org/showthread.php?t=1475997

Is there any additional information I could offer you?

Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: indicator-sound 0.2.3-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Mon May 17 18:54:47 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/bin/bash
SourcePackage: indicator-sound