diff --git a/www/command-line-options.html b/www/command-line-options.html
index 2aa8c97..19e3356 100644
--- a/www/command-line-options.html
+++ b/www/command-line-options.html
@@ -164,31 +164,31 @@
   style="margin-top: 4px; margin-left: 4px; border: 0px; float: left;" /></a>
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@@ -1338,9 +1338,9 @@
         <tr><td align="left" valign="middle">Cr=(0.500000*R&minus;0.454153*G&minus;0.045847*B)*(<em class="QR">QuantumRange</em>+1)/2</td></tr>
 
         <tr><th align="left" valign="middle">sRGB</th></tr>
-        <tr><td align="left" valign="middle">if Rs &le; .03928 then Rs=R/12.92 else Rs=((R+.055)/1.055)^2.4</td></tr>
-        <tr><td align="left" valign="middle">if Gs &le; .03928 then Gs=B/12.92 else Gs=((G+.055)/1.055)^2.4</td></tr>
-        <tr><td align="left" valign="middle">if Bs &le; .03928 then Bs=B/12.92 else Bs=((B+.055)/1.055)^2.4</td></tr>
+        <tr><td align="left" valign="middle">if Rs &le; .04045 then Rs=R/12.92 else Rs=((R+.055)/1.055)^2.4</td></tr>
+        <tr><td align="left" valign="middle">if Gs &le; .04045 then Gs=B/12.92 else Gs=((G+.055)/1.055)^2.4</td></tr>
+        <tr><td align="left" valign="middle">if Bs &le; .04045 then Bs=B/12.92 else Bs=((B+.055)/1.055)^2.4</td></tr>
 
         <tr><th align="left" valign="middle">XYZ</th></tr>
         <tr><td align="left" valign="middle">X=0.4124240*R+0.3575790*G+0.1804640*B</td></tr>
@@ -1790,7 +1790,17 @@
     <kbd>oFFs</kbd>, <kbd>pHYs</kbd>, <kbd>sRGB</kbd>, <kbd>tEXt</kbd>,
     <kbd>tRNS</kbd>, <kbd>vpAg</kbd>, and <kbd>zTXt</kbd>.</p>
 
-y</dd>
+    <p>You can also put <kbd>date</kbd> in the list to include or exclude
+    the "Date:create" and "Date:modify" text chunks that ImageMagick normally
+    inserts in the output PNG.</p>
+
+</dd>
+
+<dt>png:preserve-colormap</dt>
+  <dd>Use the existing image->colormap. Normally the PNG encoder will
+      try to optimize the palette, eliminating unused entries and putting
+      the transparent colors first.  If this flag is set, that behavior
+      is suppressed.</dd>
 
 <dt>ps:imagemask</dt>
 <dd>If the ps:imagemask flag is defined, the PS3 and EPS3 coders will create
@@ -5217,7 +5227,7 @@
 <p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert rose: -set filename:mysize '%wx%h' 'rose_%[filename:mysize].png'</span></p>
 <p>If the setting value is prefixed with "<kbd>option:</kbd>" the setting will
 be saved as a global "Artifact" exactly as if it was set using the <a
-href="#define" >-define</a> option. As such settings are globel in scope, they
+href="#define" >-define</a> option. As such settings are global in scope, they
 can be used to pass 'attributes' and 'properities' of one specific image,
 in a way that allows you to use them in a completely different image, even if
 the original image has long since been modified or destroyed. For example: </p>