nautilus prompts to burn iso when open a DVD-ROM disc

[Yuan Yijun <yuan.bbbush@xxxxxxxxx>]

rt.
I insert the disc, and login as normal user. Click on the desktop
icon, nautilus opens burn dialog instead of view disc contents; but
when click on the icon in "Computer", nautilus behaves correctly.
after eject and mount a second time, the problem remains the same.
My DVD-ROM cannot burn CD or DVD, and the disc is a normal DVD-ROM. :)
versions: nautilus-2.10.0-4, hal-0.5.2

thanks.