The arg separator is used in PHP generated URLs to separate arguments. For PHP 5.5, we changed the default PHP arg separator from & to &. To use the old arg separator, modify settings.php or wp-config.php.
Pantheon release notes
PHP Default Arg Separator
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Previously, for sites on PHP 5.5 (WordPress sites default, Drupal sites can upgrade now), code changes were only refreshed every 60 seconds, regardless of the environment. Now, Dev/Multidev environments on 5.5 will immediately see code changes, and Test/Live now refresh every 2 seconds.
nginx.conf Update for Photon
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Update: Pantheon no longer allows accessing locked environments based on the Photon user agent.
If you use Jetpack’s Photon tool, the Photon user agent can now access files on locked sites.
Documentation
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WordPress 4.2.3 is Live
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WordPress 4.2.3 is now available. This is a security release for all previous versions to protect against a cross-site scripting vulnerability that could allow users with the Contributor or Author role to compromise a site. Read Josh’s post recapping the ways we save users from automatic updates breaking their sites.
Greg Anderson created scripts and example repos to automate your builds using a composer-based workflow. Check out CI scripts, Travis CI scripts, and this exciting pull request in our Drops-7 repository.
Multidev UI Updated
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The Multidev Dashboard now provides a progress bar after the environment creation modal disappears.
Kalabox 2 <3 Pantheon
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Kalabox 2 now supports quickly pulling and pushing apps between Pantheon and your local Kalabox. Read how at GitHub.