I reinstalled GVFS and GVFS-BACKENDS from 11.04 and the bug were again there. Then I replaced only the file /usr/lib/gvfs/gvfsd-ftp using one taken from an Ubuntu 10.10, and now it works fine, so definitely the bug is in GVFSD-FTP backend.
I reinstalled GVFS and GVFS-BACKENDS from 11.04 and the bug were again there. Then I replaced only the file /usr/lib/ gvfs/gvfsd- ftp using one taken from an Ubuntu 10.10, and now it works fine, so definitely the bug is in GVFSD-FTP backend.