Wikimedia Bugzilla is closed!

Having used the new installer, I found that my wiki had no thumbnails. Making /images/ writeable was half the problem, but then I also had to remove the following from my LocalSettings.php:

$wgUseImageMagick = true;
$wgImageMagickConvertCommand = "/usr/bin/convert";

I'm running an Apache instance on a Windows 7 laptop; I am pretty sure I don't have any form of ImageMagick installed on this particular laptop. The original install log read:

* Found GD graphics library built-in.
  Image thumbnailing will be enabled if you enable uploads. 

Evidently, it is either that the installer made a bad guess that I had IM, or it was expecting a gracious fall-back to non-IM methods, neither of which it got.

That's my take on things, anyway.

(n.b. I had to set 
$wgGenerateThumbnailOnParse = true; for reasons of convencience when testing this.)