Bug#524794: libgl1-mesa-dri: OpenGL apps redraw over any other window

[GSR <gsr.bugs@infernal-iceberg.com>]

Package: libgl1-mesa-dri
Version: 7.4-2
Severity: important

Since upgrading to 7.4, glxgears, blender and others 3D apps, always
redraw on top of everything, ignoring window stacking. 2D apps are
still there, just their on screen pixels have been overwritten and a
redraw must be forced to appear (select text or scroll, eg). There is
no composite manager running.

I would try to show the artifacts, but screen captures do not show
OpenGL apps, just black or data from 2D apps (again, before upgrade,
capturing was possible with simple tools like ImageMagick's import).

DRI is on, based in glxinfo:
OpenGL vendor string: DRI R300 Project
OpenGL renderer string: Mesa DRI R300 20060815 AGP 8x x86/MMX+/3DNow!+/SSE TCL
OpenGL version string: 1.3 Mesa 7.4

GSR
 

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.29-1-686 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=es_ES.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libgl1-mesa-dri depends on:
ii  libc6                         2.9-7      GNU C Library: Shared libraries
ii  libdrm-intel1                 2.4.9-1    Userspace interface to intel-speci
ii  libdrm2                       2.4.9-1    Userspace interface to kernel DRM 
ii  libexpat1                     2.0.1-4    XML parsing C library - runtime li
ii  libgl1-mesa-glx               7.4-2      A free implementation of the OpenG

libgl1-mesa-dri recommends no packages.

Versions of packages libgl1-mesa-dri suggests:
pn  libglide3                     <none>     (no description available)

-- no debconf information