LUKS encrypted removable drives and Gnome

[Vitezslav Kotrla <vitko@post.cz>]

Is anyone using LUKS encrypted removable drives in Gnome desktop? What
is your experience?

When I plug-in my encrypted USB drive, Nautilus shows it properly in
"Computer" place. When I click on the device's icon, I expect some
dialog asking for passphrase; but window saying "Opening ..." appears
instead and waits indefinitely.

At the same time 'ps' command says

...
vitko     7806  5495  0 20:40 pts/4
00:00:00 /usr/bin/pmount-hal /dev/sdh
vitko     7807  7806  0 20:40 pts/4    00:00:00 pmount /dev/sdh usbdisk
root      7809  7807  0 20:40 pts/4    00:00:00 /sbin/cryptsetup
luksOpen /dev/sdh _dev_sdh
...

so something is going on, but no prompt for passphrase. Any ideas? I'm
runnig AMD64 Sid.

Vit