Starting Xemacs through a NXclient sesion reports this problem:
 
Lisp backtrace follows:
 
  # bind (frame-being-created)
  make-frame(nil #<x-device on "localhost:11.0" 0xb1e>)
  frame-initialize()
  # bind (debugger debug-on-error command-line-args-left)
  command-line()
  # (condition-case ... . ((t (byte-code " \ufffd\ufffd" ... 1))))
  # bind (error-data)
  normal-top-level()
  # (condition-case ... . error)
  # (catch top-level ...)
 
[1]    Segmentation fault            xemacs vpu_codec.c