diff --git a/sample-book.pdf b/sample-book.pdf
index 3f75395..23810b9 100644
Binary files a/sample-book.pdf and b/sample-book.pdf differ
diff --git a/sample-book.tex b/sample-book.tex
index 098aefe..f7c068e 100644
--- a/sample-book.tex
+++ b/sample-book.tex
@@ -735,6 +735,26 @@ being loaded.  The default is to load the \docpkg{hyperref} package and use the
 \index{class options|)}
 
 
+
+\chapter{Compatibility Issues}
+\label{ch:compatibility}
+
+When switching an existing document from one document class to a \TL document class, a few changes to the document may have to be made.
+
+\section{Converting from \doccls{article} to \doccls{tufte-handout}}
+
+The following \doccls{article} class options are unsupported: \docclsopt{10pt}, \docclsopt{11pt}, \docclsopt{12pt}, \docclsopt{a5paper}, \docclsopt{b5paper}, \docclsopt{executivepaper}, \docclsopt{legalpaper}, \docclsopt{landscape}, \docclsopt{onecolumn}, and \doccls{twocolumn}.
+
+The following headings are not supported: \doccmd{subsubsection} and \doccmd{subparagraph}.
+
+\section{Converting from \doccls{book} to \doccls{tufte-book}}
+
+The following \doccls{report} class options are unsupported: \docclsopt{10pt}, \docclsopt{11pt}, \docclsopt{12pt}, \docclsopt{a5paper}, \docclsopt{b5paper}, \docclsopt{executivepaper}, \docclsopt{legalpaper}, \docclsopt{landscape}, \docclsopt{onecolumn}, and \doccls{twocolumn}.
+
+The following headings are not supported: \doccmd{subsubsection} and \doccmd{subparagraph}.
+
+
+
 \chapter{Troubleshooting and Support}
 \label{ch:troubleshooting}
 
diff --git a/sample-handout.pdf b/sample-handout.pdf
index 764c9d3..ccfca52 100644
Binary files a/sample-handout.pdf and b/sample-handout.pdf differ
diff --git a/tufte-common.sty b/tufte-common.sty
index 377b5eb..b7b14da 100644
--- a/tufte-common.sty
+++ b/tufte-common.sty
@@ -124,7 +124,6 @@
 \DeclareOption{a5paper}{\@tufte@unsupported@option{\CurrentOption}}
 \DeclareOption{b5paper}{\@tufte@unsupported@option{\CurrentOption}}
 \DeclareOption{executivepaper}{\@tufte@unsupported@option{\CurrentOption}}
-\DeclareOption{executivepaper}{\@tufte@unsupported@option{\CurrentOption}}
 \DeclareOption{legalpaper}{\@tufte@unsupported@option{\CurrentOption}}
 \DeclareOption{landscape}{\@tufte@unsupported@option{\CurrentOption}}
 \DeclareOption{onecolumn}{\@tufte@unsupported@option{\CurrentOption}}