When connecting to an SSH server prompting for a password, ssh-askpass displays 2 buttons: OK and Cancel. Clicking Cancel seems to have the same effect as OK, that is, the prompt comes again (thankfully, it stops after 3 times). In fact, there is a difference - Cancel allows a new entry without any delay, while OK tries the password. So Cancel seems to mean "Clear". But you can't clear more than 3 times, so something is wrong.
I'm not sure whether this is a grsync or a ssh-askpass bug.
Debian Release: squeeze/sid
990 testing security.debian.org
990 testing debian.savoirfairelinux.net
500 unstable ftp.ca.debian.org
500 stable deb.opera.com
1 experimental ftp.ca.debian.org
--- Package information. ---
Depends (Version) | Installed
================================-+-==============
libatk1.0-0 (>= 1.29.3) | 1.30.0-1
libc6 (>= 2.3.6-6~) | 2.10.2-6
libcairo2 (>= 1.2.4) | 1.8.10-3
libfontconfig1 (>= 2.8.0) | 2.8.0-2
libfreetype6 (>= 2.2.1) | 2.3.11-1
libglib2.0-0 (>= 2.16.0) | 2.24.0-1
libgtk2.0-0 (>= 2.12.0) | 2.18.9-2
libpango1.0-0 (>= 1.14.0) | 1.26.2-2
rsync | 3.0.7-2
Recommends (Version) | Installed
==========================-+-===========
ssh-askpass | 1:1.2.4.1-9
Package's Suggests field is empty.