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I answered this question (links to my answer) and uploaded a couple of screenshots:

Connection between MSSQL and PHP 5.3.5 on IIS is not working

When I was composing the answer one of the uploaded screenshots wouldn't appear in the preview properly:

http://stackoverflow.com/posts/5432118/edit (screen capture)

Yi on chat had a look and it noted that removing the <pre> tags resolves this and that showdown.js (?) might not be handling raw HTML markup properly?

Update:

Arjan also points out in his answer that using sole <-- without a corresponding inside the <pre></pre> tags is also breaking something. See below.

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1  
When using <pre> (rather than indenting 4 spaces), one needs to HTML encode some characters manually to ensure a browser does not interpret it. This includes the < and > characters. So, to show the <-- without any issues, one would better type &lt;-- instead. –  Arjan Mar 25 '11 at 12:47
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I missed this report. See meta.stackexchange.com/questions/89734/mysterious-butt, which was arguably more interesting :) –  balpha May 3 '11 at 19:43
    
@balpha - yep that's a way more interesting variant :) –  Kev May 3 '11 at 20:25

1 Answer 1

It's lowercasing the image URL, somehow, and http://i.stack.imgur.com/yqdjc.jpg is not the same as http://i.stack.imgur.com/yqDjc.jpg.

For this specific case, this is caused by the non-encoded <-- below (which should read &lt;-- instead):

<pre>
extension=php_sqlsrv_53_nts_vc9.dll
extension=php_pdo_sqlsrv_53_nts_vc9.dll   <-- optional
</pre>

This also breaks other parts of the preview.

However, I've noticed that while editing, images might temporarily not render either when typing an opening tag somewhere above an image, and/or when opening and closing tags don't match yet? Like as soon as one has typed <b for <b>...</b>, an unrelated image might no longer show.

So the bug report still stands, I'd say.

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Some day, the lowercase image URL will in fact exist, but be a different image. That might have been fun! –  Arjan Mar 25 '11 at 12:35
    
LOL...I hadn't spotted that case mattered. Also good catch on the <--, I missed that. Have fudged for now. –  Kev Mar 25 '11 at 12:37
    
now here - Mysterious Butt –  YOU May 3 '11 at 19:32

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