Version: (using KDE KDE 3.5.5) Installed from: Debian testing/unstable Packages Method "Mount" with signature "ssas" on interface "org.freedesktop.Hal.Device.Volume" doesn't exist
I can confirm this bug on fedora core 5 and 6. Communicating directly with hal by a selfmade python script shows that hal is working as expected.
The same for me, kde-3.5.6, hal-0.5.9.1, libata, on a LFS system. hal-device-manager shows the correct device and volume (in my case /dev/sdb4), konqueror tries to mount the device, not the volume, then /dev/sdb instead of /dev/sdb4, indeed that "ssas" and "as" methods are in the volume capability, not in the device.
KDE 3.x is no longer maintained, and KDE4 has already dropped HAL. If you still see this problem with current KDE >= 4.6.4, please reopen.