Testing with either the LiveCD or with an upgrade is sufficient.
Philip, can you also add comments about what you're seeing to the upstream bug report? https://bugs.freedesktop.org/show_bug.cgi?id=12007
Also, I just updated intrepid to debian's latest -ati snapshot yesterday, so if they want you to test with a newer version you can probably do a system update to get it.
Testing with either the LiveCD or with an upgrade is sufficient.
Philip, can you also add comments about what you're seeing to the upstream bug report? https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 12007
Also, I just updated intrepid to debian's latest -ati snapshot yesterday, so if they want you to test with a newer version you can probably do a system update to get it.