limit width of diagram thumbnail to column width, fix unitless CSS lengths, </img>

[Imported from Trac: page WikiStart, version 243]

Home.md

@@ -2,15 +2,15 @@
 
 <div style="margin-right: 60; float: left; width:50%;">
 	<h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif">Welcome to Tahoe-LAFS</h1>
-		<div style="margin-right: 400">
+		<div>
 			<p>
 				Tahoe-LAFS is a secure, decentralized, fault-tolerant filesystem. All of the source code is available under a choice of two Free Software, Open Source licences. 
 				This filesystem is encrypted and spread over multiple peers in such a way that it remains available even when some of the peers are unavailable, malfunctioning, or malicious.</p>
-<p><a href="<http://allmydata.org/source/tahoe/trunk/docs/about.html>"><img src="(@@http://testgrid.allmydata.org:3567/file/URI%3ACHK%3A6opfg3uvhrvixw7c5u7kye3bjq%3Aeiqvmup7yog2rlwa2acoom2jrmgciuwr5bw5vkemxuqyg2jfbsqq%3A3%3A10%3A50638/@@named=/network-and-reliance-topology-thumb512.png@@)"></img></a></p>
+<p><a href="<http://allmydata.org/source/tahoe/trunk/docs/about.html>"><img src="(@@http://testgrid.allmydata.org:3567/file/URI%3ACHK%3A6opfg3uvhrvixw7c5u7kye3bjq%3Aeiqvmup7yog2rlwa2acoom2jrmgciuwr5bw5vkemxuqyg2jfbsqq%3A3%3A10%3A50638/@@named=/network-and-reliance-topology-thumb512.png@@)" style="max-width: 90%; height: auto;"></a></p>
 <p><a href="<http://allmydata.org/source/tahoe/trunk/docs/about.html>">The one-page summary</a> explains the unique properties of this system.</p>
 		</div>
 		
- <h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10">Get Started</h1>
+ <h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10px">Get Started</h1>
   <ul>
     <li><a href="<http://testgrid.allmydata.org:3567/uri/URI%3ADIR2%3Adjrdkfawoqihigoett4g6auz6a%3Ajx5mplfpwexnoqff7y5e4zjus4lidm76dcuarpct7cckorh2dpgq>">Try Tahoe-LAFS now!</a> (For more information see <a href="<http://allmydata.org/trac/tahoe/wiki/TestGrid>">the [TestGrid](TestGrid) Page</a> on the wiki.)</li>
     <li><a href="<http://allmydata.org/source/tahoe/trunk/docs/install.html>">Download</a> and install it on your own system.</li>
@@ -23,14 +23,14 @@
     <li><a href="<http://allmydata.org/trac/tahoe/wiki/Dev>">The Dev page</a> is the place to start hacking on Tahoe-LAFS.</li>
   </ul>
 
- <h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10">Documentation</h1>
+ <h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10px">Documentation</h1>
   <ul>
     <li>See <a href="<http://allmydata.org/trac/tahoe/wiki/Doc>">the Doc page</a> for explanation of how Tahoe-LAFS works.</li>
     <li>See <a href="<http://allmydata.org/trac/tahoe/wiki/TracStartingPoints>">TracStartingPoints</a> for how to use this bug-tracker/source-code-browser/wiki.</li>
     <li><a href="<http://allmydata.org/trac/tahoe/wiki/TitleIndex>">TitleIndex</a> is a complete list of pages on this wiki.</li>
   </ul>
 
-  <h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10">Sponsorship</h1>
+  <h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10px">Sponsorship</h1>
 		<p>
 			<a href="<http://www.allmydata.com/index.php?tracking=allmydata_org>">allmydata.com</a> sponsors the Tahoe-LAFS project by providing hardware and data-center facilities along with the initial developer time. We are eternally grateful for their generous and public-spirited support. Please contact secorp@allmydata.org if you would like to sponsor Tahoe-LAFS too!
 		</p>
@@ -50,7 +50,7 @@ Carbonite CEO: Online Backups Sell</a></td></tr>
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-	<h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10">Donate!</h1>
+	<h1 style="color: #2f8ab5; font-family: helvetica, arial, sans-serif; margin-top: 10px">Donate!</h1>
 		<p>
 			&nbsp;&nbsp;&nbsp;&nbsp;You can sponsor the Tahoe-LAFS project!
 <form action="<https://www.paypal.com/cgi-bin/webscr>" method="post">