Some of those fixes have been part of xorg's INITIAL damage.c from
2004. They where missing in NX nevertheless. The other fixes come from
this commit:

commit fec868bf0f67a8f62fc69d55e2ff72b6cacea6f8
  Author: Roland Mainz <roland.mainz@nrubsig.org>
  Date:   Tue Nov 23 17:10:55 2004 +0000

    //freedesktop.org/bugzilla/show_bug.cgi?id=1204): Fix X11 test suite
        (caused by DAMAGE layer) failure with Xvfb when rendering text using
        |XDrawText*()| (XDrawText() tests 1, 3, 4, 27, 28,
    29, 30, 34, 37, 39, 41, 43 and XDrawText16() tests 1, 3, 9, 10, 11, 12,
    13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 34,
    37, 39, 41, 43). Patch by Hong Bo Peng <penghb@cn.ibm.com> and Stefan
        Dirsch <sndirsch@suse.de>.