Problems with X11 Composite Extension

When I enabled trancelucency in my KDE the composite manager crashed with the
message asking to insert the following lines in xorg.conf.

Section "Extensions"
Option "Composite" "Enable"
EndSection

And so I did and forgot about it for a week. Last week when I tried to launch
gnucash it wouldn't . It cried something like this.

-------
Gdk-CRITICAL **: file gdkwindow.c: line 1406 (gdk_window_get_visual):
assertion `window != NULL' failed.

Gdk-CRITICAL **: file gdkcolor.c: line 57 (gdk_colormap_new): assertion
`visual != NULL' failed.
SESSION_MANAGER=tcp/pdm1:53739

Gdk-CRITICAL **: file gdkwindow.c: line 1406 (gdk_window_get_visual):
assertion `window != NULL' failed.

Gdk-CRITICAL **: file gdkcolor.c: line 57 (gdk_colormap_new): assertion
`visual != NULL' failed.
Gdk-ERROR **: BadDrawable (invalid Pixmap or Window parameter)
serial 47 error_code 9 request_code 132 minor_code 5
Gdk-ERROR **: BadDrawable (invalid Pixmap or Window parameter)
serial 48 error_code 9 request_code 55 minor_code 0
--------

I thought one of yum update screwed it up. So I looked through the recent
update logs and couldn't find anything remotely connected to gnucash , X11,
gdk or my window manager. Frustrated like hell I stopped thinking about this
problem. I couldn't do my accounting for a week!

It wasn't until I tried to launch one more app which failed with the same
exception. I then started digging deep and found that the culprit was the
Composite extension option. So I disabled the following from xorg.conf

#Section "Extensions"
#Option "Composite" "Enable"
#EndSection

and yes I did my accounts immediately!