vino kills gnome-panel when "Allow other users to view your desktop" deselected

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please try to obtain a backtrace following the instructions at http://wiki.ubuntu.com/DebuggingProgramCrash and upload the backtrace (as an attachment) to the bug report. This will greatly help us in tracking down your problem.

I'm having problem fetching package vino with debug symbols along the steps from the wiki Sebastien has provided,

Err http://ddebs.ubuntu.com lucid-security/main Packages
  404 Not Found

Therefore the backtrace is useless. What's more, I'm having problems with tracing the problem - vino doesn't crash when it kills gnome-panel, and when I attached gdb to gnome-panel, it said that program exited normally. This seems to be a tough bug for a novice debugger. If there's a need, I can share my desktop with a trusted developer to see into the problem (and no, I don't do that usually ;) but this is way to hard to trace for me).

=== ! ===

Important notice: before deselecting "Allow users to view your desktop" the lower box "Allow other users to control ..." has to be selected. If not, deselecting the first checkbox doesn't cause gnome-panel to terminate.

I'm also encountering this. Sebastien could you simply open up vino-preferences & tick "allow others to..." on and off and confirm that yes, it does infact happen for you?

Following the page you give me, stall in the same place...

$ apt-cache policy vino
vino:
  Installed: 2.28.2-0ubuntu2
  Candidate: 2.28.2-0ubuntu2
  Version table:
 *** 2.28.2-0ubuntu2 0
        500 http://gb.archive.ubuntu.com/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status
pricey@ubuntu:~$ sudo apt-get install vino-dbgsym=2.28.2-0ubuntu2
[sudo] password for pricey:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package vino-dbgsym