X Error of failed request: BadAtom (invalid Atom parameter) onlocal (non-remote) XServer

[Andrew N. Below]

 Hello.

 I'm running rdesktop 1.4.1 on FreeBSD 5.4-RELEASE-p6
with Xorg 6.8.2 to connect to remote windows NT terminal.
Periodically it stops working with the following message:

X Error of failed request:  BadAtom (invalid Atom parameter)
  Major opcode of failed request:  18 (X_ChangeProperty)
  Atom id in failed request:  0x0
  Serial number of failed request:  1118892
  Current serial number in output stream:  1118893

"Atom id" is always 0x0, next two nubmers are different.
I use windowmaker with several "workplaces" as X window manager.
rdesktop is usually running in a separate workplace, and
I never saw as it crushes: it always happenned then when I
worked in other workplaces.

Several days ago FreeBSD has been updated from 5.2.1 to 5.4 via cvsup.
xfree86 has been updated to xorg, and new version of rdesktop has
been installed.

Search has shown that people tested similar problems starting
some X-applications on the remote machines through ssh with X-forwarding
enabled. So, to solve that kind of problem it was necessary to
enable ForwardX11Trusted in ssh_config.

What should I do in my case?

--
WBR, Andrew.