XEmacs crashes on SPARC Solaris 8

[Adalbert Perbandt]

Hi there,

since some time we are experiencing sporadic crashes of XEmacs 21.4.18 on the
Sun SPARC Solaris 8 platform. The crashes seem to have be related to an X11
problem. Messages of this kind show up in the shell from which XEmacs was started:

X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  25 (X_SendEvent)
  Resource id in failed request:  0x8403482
  Serial number of failed request:  52523
  Current serial number in output stream:  52523
X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  18 (X_ChangeProperty)
  Resource id in failed request:  0x8403483
  Serial number of failed request:  52591
  Current serial number in output stream:  52592
X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  25 (X_SendEvent)
  Resource id in failed request:  0x8403483
  Serial number of failed request:  52592
  Current serial number in output stream:  52592
X Error of failed request:  BadWindow (invalid Window parameter)
  Major opcode of failed request:  25 (X_SendEvent)
  Resource id in failed request:  0x8403484
...

There does not seem to exist a specific sequence of actions which triggers the
crashes.

Is there anything known about a possible workaround for this issue?

Regards

Adalbert Perbandt