kde systray icons have black backgrounds with desktop effects enabled

[Terry]

This upsets the otherwise pleasing feel of KDE4 with desktop effects enabled. This is on my laptop which has Intel Graphics but I do not think this is graphics driver specific as I have noticed this with Nvidia on my workstation too.

System tray icon backgrounds should appear transparent with desktop effects enabled.

System tray icons actually appear with black backgrounds with desktop effects enabled.

Description: Ubuntu intrepid (development branch)
Release: 8.10

xserver-xorg:
  Installed: 1:7.4~2ubuntu1
  Candidate: 1:7.4~2ubuntu1
  Version table:
 *** 1:7.4~2ubuntu1 0
        500 http://gb.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

xserver-xorg-video-intel:
  Installed: 2:2.4.1-1ubuntu4
  Candidate: 2:2.4.1-1ubuntu4
  Version table:
 *** 2:2.4.1-1ubuntu4 0
        500 http://gb.archive.ubuntu.com intrepid/main Packages
        100 /var/lib/dpkg/status

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)