title: Error "The server sent an improper HTTP response." on commit with Subversion 1.8+ client
body: <p>Recently I have been plagued by an error on committing to a single SVN repo using TortoiseSVN (1.8.7.25475) or AnkhSVN (2.5.12471.17):</p>
  
  <blockquote>
    <p>Error running context: The server sent an improper HTTP response</p>
  </blockquote>
  
  <p>Here is a screenshot of the error in TortoiseSVN:</p>
  
  <p><img src="https://i.stack.imgur.com/itjLN.png" alt="TortoiseSVN &#39;Improper HTTP Response&#39; Error"></p>
  
  <p>The pixels differ of course, but the error is the same in AnkhSVN.</p>
  
  <p>This only seems to affect attempts to commit modifications, not additions or deletions; and I can commit mods to several other SVN repos on the same server just fine.</p>
  
  <p>Since my teammates continue to commit mods to the repo in question and the issue has only struck my commits to that repo, I tried committing simple mods after a fresh checkout of the repo: a few one-mod-at-a-time commits worked, but then...same error.</p>
  
  <p>I also searched for, reviewed, and tried some possible solutions (e.g. in <a href="http://tortoisesvn.tigris.org/ds/viewMessage.do?dsMessageId=3065580&amp;dsForumId=4061" rel="noreferrer">a thread on the TortoiseSVN forums to which Stefan Küng replied</a>) - a registry tweak (deleting <code>HKEY_CURRENT_USER\Software\Tigris.org</code> - after exporting it for backup of course), checking my global properties, and ensuring that I am not using a proxy.  Same error.</p>
  
  <p>Finally, I tried both repairing and downgrading TortoiseSVN.  Same error.</p>
  
  <p><em>Has anyone else encountered this error under similar circumstances and found a solution to it?</em></p>
  
  <p>Note that some related search results mention tweaking <code>httpd.conf</code> or other aspects of the SVN <em>server</em>, but server tweaks seem inappropriate to me.  Again, my teammates continue to commit mods to the same repo using the same version of TortoiseSVN, the same OS (Win 7 Pro 64-bit) etcetera.  Maybe I have missed something on the server that could just happen to affect me, though.</p>