analyzing X11 traffic?

[Jeremy C. Reed]

What do you all use for analyzing or watching X11 traffic?

Today I played with ethereal but it had a lot of unknown.

And then I used Debian's xtrace under NetBSD. (I had to patch a few 
Linuxism.)

xtrace seems useful. I also used Xnest so I could trace a window manager.

(I learned that the window manager I am using continuously does 
QueryPointer :(

What do you use for watching X11 communications?

 Jeremy C. Reed