Mention the necessary configuration file header.
diff --git a/documentation/configuring.sgml b/documentation/configuring.sgml
index a6496db..d7f86dc 100644
--- a/documentation/configuring.sgml
+++ b/documentation/configuring.sgml
@@ -222,6 +222,13 @@
of your user's home directory
(directory <filename>/home/user/</filename>). In other words, the Wine
configuration file is <filename>~/.wine/config</filename>.
+ Note that since the Wine configuration file is a part of the
+ Wine registry file system, this file also
+ <emphasis>requires</emphasis> a correct "WINE REGISTRY
+ Version 2" header line to be recognized properly, just like
+ all other Wine registry text files (just in case you decided
+ to write your own registry file from scratch and wonder why
+ Wine keeps rejecting it).
</para>
<para>
The settings available in the configuration file include:
