diff --git a/content/buffer.js b/content/buffer.js
index d08b97f1..bb917fbe 100644
--- a/content/buffer.js
+++ b/content/buffer.js
@@ -466,9 +466,12 @@ liberator.Buffer = function () //{{{
         "Select the author style sheet to apply",
         function (args)
         {
-            if (!args)
+            // TODO: move alternate stylesheet listing function here
+            var stylesheets = liberator.completion.stylesheet()[1].map(function (s) { return s[0]; });
+
+            if (args && !stylesheets.some(function (s) { return s == args; }))
             {
-                liberator.echoerr("E471: Argument required");
+                liberator.echoerr("Exxx: No matching stylesheet");
                 return;
             }
 
diff --git a/locale/en-US/buffer.txt b/locale/en-US/buffer.txt
index a9742c18..f8291929 100644
--- a/locale/en-US/buffer.txt
+++ b/locale/en-US/buffer.txt
@@ -218,7 +218,7 @@ Set full zoom value of current web page. Zoom value can be between 1 and
 ________________________________________________________________________________
 
 
-|:zo| |:zoom|
+|:zoom| |:zo|
 ||:zo[om][!] [value]|| +
 ||:zo[om][!] +{value} | -{value}|| +
 ________________________________________________________________________________
@@ -252,12 +252,14 @@ ________________________________________________________________________________
 
 section:Alternate{nbsp}style{nbsp}sheets[stylesheet,style]
 
+Page authors may specify alternate style sheets for an HTML document.  Users
+can then switch between these various style sheets, selecting their favorite.
+
 |:pagest| |:pagestyle|
-||:pagest[yle] {style}|| +
+||:pagest[yle] [stylesheet]|| +
 ________________________________________________________________________________
-Select the author style sheet to apply.  Page authors may specify alternate
-style sheets for an HTML document.  Users can then switch between these various
-style sheets, selecting their favorite.
+Select the author style sheet to apply.  If [stylesheet] is not specified the
+page's default stylesheet is used.
 
 All author styling can be removed by setting the 'usermode' option.
 ________________________________________________________________________________