I have an environment where I use ssh to log into a machine with X-forwarding enabled and run xemacs which displays across the ssh tunnel to my local machine.  The remote machine (the one running xemacs) is running Redhat Linux 7.3; the local machine (where xemacs would display) is Windows NT using WebTerm X, an X server from a company called PowerLan.  It's not the most recent version; I've had it for around 3 years.  This problem occurs right after I run xemacs:

Warning: Missing charsets in String to FontSet conversion
Warning: Cannot convert string "-*-helvetica-bold-r-*-*-*-120-*-*-*-*-iso8859-*" to type FontSet
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset
Warning: Missing charsets in String to FontSet conversion
Warning: Unable to load any usable fontset

Fatal error (11).

Your files have been auto-saved.
Use `M-x recover-session' to recover them.

If you have access to the PROBLEMS file that came with your
version of XEmacs, please check to see if your crash is described
there, as there may be a workaround available.
Otherwise, please report this bug by running the send-pr
script included with XEmacs, or selecting `Send Bug Report'
from the help menu.
As a last resort send ordinary email to `crashes@xemacs.org'.
*MAKE SURE* to include the information in the command
M-x describe-installation.

If at all possible, *please* try to obtain a C stack backtrace;
it will help us immensely in determining what went wrong.
To do this, locate the core file that was produced as a result
of this crash (it's usually called `core' and is located in the
directory in which you started the editor, or maybe in your home
directory), and type

  gdb /usr/bin/xemacs core

then type `where' when the debugger prompt comes up.
(If you don't have GDB on your system, you might have DBX,
or XDB, or SDB.  A similar procedure should work for all of
these.  Ask your system administrator if you need more help.)

Lisp backtrace follows:

  # bind (frame-being-created)
  make-frame(nil #<x-device on "localhost:10.0" 0x23e0>)
  frame-initialize()
  # bind (debugger debug-on-error command-line-args-left)
  command-line()
  # (unwind-protect ...)
  normal-top-level()
  # (condition-case ... . error)
  # (catch top-level ...)
Segmentation fault (core dumped)

================ C backtrace ====================

(gdb) where
#0  0x42029331 in kill () from /lib/i686/libc.so.6
#1  0x080ace17 in fatal_error_signal ()
#2  <signal handler called>
#3  0x401dedbd in XFontsOfFontSet () from /usr/X11R6/lib/libX11.so.6
#4  0x081abd6c in extract_font_extents ()
#5  0x081abe27 in XlwMenuInitialize ()
#6  0x40150947 in XtInitializeWidgetClass () from /usr/X11R6/lib/libXt.so.6
#7  0x40150e51 in XtInitializeWidgetClass () from /usr/X11R6/lib/libXt.so.6
#8  0x40151329 in _XtCreateWidget () from /usr/X11R6/lib/libXt.so.6
#9  0x401513ad in XtCreateWidget () from /usr/X11R6/lib/libXt.so.6
#10 0x081acb97 in xlw_create_menubar ()
#11 0x081a7ac3 in instantiate_widget_instance ()
#12 0x081a6fd7 in allocate_widget_instance ()
#13 0x081a7bde in lw_make_widget ()
#14 0x080c94dc in set_frame_menubar ()
#15 0x080c9563 in x_initialize_frame_menubar ()
#16 0x0818f35e in x_create_widgets ()
#17 0x0818f659 in x_init_frame_1 ()
#18 0x08110886 in Fmake_frame ()
#19 0x080b3cdc in Ffuncall ()
#20 0x0808f4cb in execute_optimized_program ()
#21 0x0808f167 in funcall_compiled_function ()
#22 0x080b3e1e in Ffuncall ()
#23 0x0808f4cb in execute_optimized_program ()
#24 0x0808f167 in funcall_compiled_function ()
#25 0x080b3e1e in Ffuncall ()
#26 0x0808f4cb in execute_optimized_program ()
#27 0x0808f167 in funcall_compiled_function ()
#28 0x080b3987 in Feval ()
#29 0x080b124e in condition_case_1 ()
#30 0x080995a0 in top_level_1 ()
#31 0x080b0eea in internal_catch ()
#32 0x080996a5 in initial_command_loop ()
#33 0x080add68 in xemacs_21_4_6_i386_redhat_linux ()
#34 0x080ae533 in main ()
#35 0x42017589 in __libc_start_main () from /lib/i686/libc.so.6
(gdb)

========= M-x describe-installation ===========

uname -a: Linux daffy.perf.redhat.com 2.4.17-0.13smp #1 SMP Fri Feb 1 10:30:48 EST 2002 i686 unknown

./configure  'i386-redhat-linux' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--datadir=/usr/share' '--libdir=/usr/lib' '--mandir=/usr/share/man/man1' '--infodir=/usr/share/info' '--with-gpm=no' '--with-sound=native' '--with-pop' '--mail-locking=lockf' '--with-clash-detection' '--debug=no' '--error-checking=none' '--with-mule=yes' '--with-database=no' '--with-ldap=yes' '--with-hesiod=no' '--with-canna=yes' '--with-wnn=yes' '--with-menubars=lucid' '--with-scrollbars=lucid' '--with-dialogs=lucid' '--with-xim=xlib' '--with-msw=no' '--with-xfs=yes'


XEmacs 21.4.6 "Common Lisp" configured for `i386-redhat-linux'.


Compilation / Installation:
  Source code location:              /usr/src/build/74640-i386/BUILD/xemacs-21.4.6
  Installation prefix:               /usr
  Operating system description file: `s/linux.h'
  Machine description file:          `m/intel386.h'
  Compiler:                          gcc -O2 -march=i386 -mcpu=i686
  Relocating allocator for buffers:  no
  GNU version of malloc:             yes
    - Using Doug Lea's new malloc from the GNU C Library.
  Linking with `-z nocombreloc'.
    - Consider configuring with --pdump.

Window System:
  Compiling in support for the X window system:
    - X Windows headers location:                 /usr/X11R6/include
    - X Windows libraries location:               /usr/X11R6/lib
    - Handling WM_COMMAND properly.
  Using Lucid menubars.
  Using Lucid scrollbars.

TTY:
  Compiling in support for ncurses.

Images:
  Compiling in support for GIF  images (builtin).
  Compiling in support for XPM  images.
  Compiling in support for PNG  images.
  Compiling in support for JPEG images.
  Compiling in support for TIFF images.

Sound:
  Compiling in support for sound (native).

Databases:
  Compiling in support for LDAP.
  Compiling in support for PostgreSQL.
    - Using PostgreSQL header file:  libpq-fe.h
    - Using PostgreSQL V7 bindings.

Internationalization:
  Compiling in support for Mule (multi-lingual Emacs).
  Compiling in support for XIM (X11R5+ I18N input method).
    - Using raw Xlib to provide XIM support.
    - Using XFontSet to provide bilingual menubar.
  Compiling in support for Canna on Mule.
  Compiling in support for the WNN input method on Mule.

Mail:
  Compiling in support for POP mail retrieval.
  Compiling in support for "lockf" mail spool file locking method.

Other Features:
  Inhibiting IPv6 canonicalization at startup.
  Compiling in support for dynamic shared object modules.