FVWM: fvwm: ../../src/xcb_io.c:626: _XAllocID: Assertion `ret != inval_id' failed.

Hi folks,

sometimes fvwm 2.70 (built by Debian) dies with

Apr 04 10:15:29 [FVWM_SMDEBUG] Saving /local/home/harri/.fvwm/.fs-restart-cecil.afaics.de:4
Apr 04 10:15:30 [FVWM_SMDEBUG] Loading /local/home/harri/.fvwm/.fs-restart-cecil.afaics.de:4
Apr 04 10:15:30 [fvwm][__execute_function]: <<ERROR>> No such command 'DesktopConfiguration'
Apr 04 10:15:30 [fvwm][style_parse_and_set_window_style]: <<ERROR>> Bad style option: MWMDecorHints
Apr 04 10:15:30 [fvwm][ParseBinding]: <<WARNING>> Got mouse button 8 when the maximum is 5.
Apr 04 10:15:30   You can't bind complex functions to this button.  To suppress this warning, use:
Apr 04 10:15:30   Silent Mouse 8                A       A       Menu Window-Ops Nop
Apr 04 10:15:30 [fvwm][ParseBinding]: <<WARNING>> Got mouse button 9 when the maximum is 5.
Apr 04 10:15:30   You can't bind complex functions to this button.  To suppress this warning, use:
Apr 04 10:15:30   Silent Mouse 9                A       A       Exec xterm &
Apr 04 10:15:30 [fvwm][scanForPixmap]: <<WARNING>> Couldn't load image from pavucontrol.png
Apr 04 10:15:30 [fvwm][scanForPixmap]: <<WARNING>> Check that FVWM has support for the filetype it's being asked to load.
Apr 04 10:15:30 fvwm: ../../src/xcb_io.c:626: _XAllocID: Assertion `ret != inval_id' failed.
Apr 04 10:15:30 /local/home/harri/.xinitrc: line 120:  9022 Aborted                 ${WINDOWMANAGER}

on an internal restart.

Does this ring a bell?

Regards
Harri