Added a useful warning to the documentation.
diff --git a/Doc/lib/libcfgparser.tex b/Doc/lib/libcfgparser.tex
index 0ad9d61..1386193 100644
--- a/Doc/lib/libcfgparser.tex
+++ b/Doc/lib/libcfgparser.tex
@@ -13,10 +13,12 @@
\index{Windows ini file}
The \class{ConfigParser} class implements a basic configuration file
parser language which provides a structure similar to what you would
-find on Microsoft Windows INI files. You can use this to write Python
+find on Microsoft Windows INI files. (Beware: this library does \emph{not}
+interpret or write the value-type prefixes used in the Windows
+Registry extended version of INI syntax.) You can use this to write Python
programs which can be customized by end users easily.
-The configuration file consists of sections, lead by a
+The configuration file consists of sections, led by a
\samp{[section]} header and followed by \samp{name: value} entries,
with continuations in the style of \rfc{822}; \samp{name=value} is
also accepted. Note that leading whitespace is removed from values.