I see the attached xvideo corruption with kernel modesetting on Radeon X1550 64-bit and the following fedora development components. xorg-x11-server-Xorg-1.5.1-4.fc10.i386 xorg-x11-drv-ati-6.9.0-21.fc10.i386 mesa-dri-drivers-7.2-0.3.fc10.i386 libdrm-2.4.0-0.21.fc10.i386 kernel-2.6.27-0.376.rc8.git1.fc10.i686 Attaching dmesg and Xorg.0.log , X is run without xorg.conf from runlevel 3 with startx. The corruption is progressive, the clip starts ok, then degrades with every frame.
Created attachment 318176 [details] full dmesg
Created attachment 318177 [details] Xorg.0.log
Created attachment 318178 [details] corruption
should be fixed in kernel-2.6.27-0.393.rc8.git7.fc10 please close bug if it works for you.
Indeed, 2.6.27-0.393.rc8.git7.fc10 fixes it for me. Thanks. Closing.