Fix by changing PEXOCPickXorg to PEXOCPickId (Score 1)

The build problem you describe was caused when X.Org filered the final source to replace rcs keywords $Id: to $Xorg: so that the released rcs id would be preserved at the user site.

Unfortunately three (3) files resulted in incorrect substitutions as you describe.

Quick fix is to do the following:
1) change PEXOCPickXorg to PEXOCPickId in:
xc/programs/Xserver/PEX5/ddpex/mi/level3/miRende r.c
xc/programs/Xserver/PEX5/ddpex/mi/level4/miTrave rse.c

2) change Xorg: to Id: in ErrorF format strings in:
xc/programs/Xserver/PEX5/ddpex/mi/level4/miStruc t.c

A public patch will follow.