Comment 2 for bug 198232

Packages:
$ dpkg -l | grep qemu
ii kqemu-common 1.3.0~pre11-8 Common files for the QEMU Accelerator module
ii kqemu-modules-2.6.22-14-generic 1.3.0~pre11-6+2.6.22-14.52 kqemu modules for Linux (kernel 2.6.22-14-gene
ii kqemu-modules-2.6.24-16-generic 1.3.0~pre11-8+2.6.24-16.30 kqemu modules for Linux (kernel 2.6.24-16-gene
ii kqemu-source 1.3.0~pre11-8 Source for the QEMU Accelerator module
ii qemu 0.9.1-1ubuntu1 fast processor emulator
$ uname -r
2.6.24-17-generic
$
Currently running Ubuntu 8.04 with all current updates, backports and security updates, except kernel.

Debug:
$ qemu-img create -f qcow test.qcow 2G
Formatting 'test.qcow', fmt=qcow, size=2097152 kB
$ file test.qcow
test.qcow: QEMU Copy-On-Write disk image version 1, size 0 + -2147483648
$ qemu-img create -f qcow2 test.qcow 2G
Formatting 'test.qcow', fmt=qcow2, size=2097152 kB
$ file test.qcow
test.qcow: QEMU Copy-On-Write disk image version 2, size 0 + -2147483648
$