When uploading large images over an approximate size (~2500×2000) I was encountering the HTTP Error message when trying to crunch the image (which ultimately fails and doesn’t produce the smaller pre-defined image sizes).

After trying several solutions, the following appears to have solved it for my setup, once and for all – add this to your .htaccess file:

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The Theme Review Guidelines are often updated as each new version of WordPress is released, and although these guidelines are for themes submitted to the WordPress theme repository, they are a good baseline to which all themes should strive to achieve.

If your theme was written a while ago, your site might not be following all of the current best practices. Here are a few simple alterations you can make to your style.css file.

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1. SSH into your server, then navigate to your domain’s web root:
   cd /var/www/vhosts/example.com/httpdocs
2. Grab the latest WP install
   wget http://wordpress.org/latest.tar.gz
3. Get the files out of the archive:
   tar xfz latest.tar.gz
4. Navigate to the wordpress subfolder:
   cd wordpress
5. Copy everything back up to the web root:
   cp -rpf * ../
6. Navigate back up to web root:
   cd ..
7. Remove the wordpress subfolder:
   rm -rf wordpress
8. Remove the downloaded archive file:
   rm -f latest.tar.gz

Update: http://code.garyjones.co.uk/enqueued-style-sheet-extras/#ie

Over time, Internet Explorer (IE) is getting better at rendering web pages how we want them, but while IE7 and earlier versions still have a (fast-fading) grip, we sometimes still need to provide exclusive styles to make them render our sites in an acceptable way. That is where conditional style sheets are used.
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