Ooops!
I've tried again these steps with Ubuntu 9.04 server, selecting ext4 filesystems, and stalls in the same way.
Now I've tried the same steps with Ubuntu 10.04 server (developing version of 2010.01.01), selecting ext3 format for silesystems, and the process continues without this problem.
Then I see that the bug can be reproduced when the ext4 format is selected.
Ooops!
I've tried again these steps with Ubuntu 9.04 server, selecting ext4 filesystems, and stalls in the same way.
Now I've tried the same steps with Ubuntu 10.04 server (developing version of 2010.01.01), selecting ext3 format for silesystems, and the process continues without this problem.
Then I see that the bug can be reproduced when the ext4 format is selected.