Description of problem:

From an X session, connect to local or remote host using ssh with X11
forwarding.  Fire up an application, e.g. xterm or emacs and select
some text by clicking and dragging mouse.  Application dies with error
message such as:
X Error of failed request:  BadAtom (invalid Atom parameter)
    Major opcode of failed request:  18 (X_ChangeProperty)
    Atom id in failed request:  0x1a8
    Serial number of failed request:  208
    Current serial number in output stream:  210

or

X protocol error: BadWindow (invalid Window parameter) on protocol
request 38

Workaround: this behavior goes away if ssh -Y option is used or
ForwardX11Trusted=yes is in ssh_config.

Version-Release number of selected component (if applicable):
openssh-3.9p1-7
xorg-x11-6.8.1-12.FC3.21

How reproducible: always


Steps to Reproduce:
1. log on to X
2. ssh somehost
3. xterm &
4. click and drag mouse over some text
  
Actual results:
program dies and closes window with BadWindow or BadAtom error

Expected results:
program should continue running with text selected

Additional info:
See
http://www.brandonhutchinson.com/BadAtom_BadWindow_errors_with_ssh_X11_forwarding.html
for an independent report.