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Wagtail 0.8 release notes - IN DEVELOPMENT
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What's new
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Minor features
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 * Page operations (creation, publishing, copying etc) are now logged via Python's ``logging`` framework; to configure this, add a logger entry for ``'wagtail'`` or ``'wagtail.core'`` to the ``LOGGING`` setup in your settings file.
 * The save/publish/submit buttons on the page edit page now redirects the user back to the edit page instead of the explorer
 * Signal handlers for ``wagtail.wagtailsearch`` and ``wagtail.contrib.wagtailfrontendcache`` are now automatically registered when using Django 1.7 or above.
 * Added a Django 1.7 system check to ensure that foreign keys from Page models are set to ``on_delete=SET_NULL``, to prevent inadvertent (and tree-breaking) page deletions
 * Improved error reporting on image upload, including ability to set a maximum file size via a new setting ``WAGTAILIMAGES_MAX_UPLOAD_SIZE``


Bug fixes
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 * Replaced references of .username with .get_username() on users for better custom user model support
 * Unpinned dependency versions for six and requests to help prevent dependency conflicts
 * Fixed TypeError when getting embed HTML with oembed on Python 3
 * Made HTML whitelisting in rich text fields more robust at catching disallowed URL schemes such as ``jav\tascript:``
 * ``created_at`` timestamps on page revisions were not being preserved on page copy, causing revisions to get out of sequence
 * When copying pages recursively, revisions of sub-pages were being copied regardless of the ``copy_revisions`` flag
 * Updated the migration dependencies within the project template to ensure that Wagtail's own migrations consistently apply first
 * The cache of site root paths is now cleared when a site is deleted
 * Search indexing now prevents pages from being indexed multiple times, as both the base Page model and the specific subclass
 * Search indexing now avoids trying to index abstract models
 * Fixed references to "username" in login form help text for better custom user model support
 * Later items in a model's search_field list now consistently override earlier items, allowing subclasses to redefine rules from the parent
 * Image uploader now accepts JPEG images that PIL reports as being in MPO format
 * Multiple checkbox fields on form-builder forms did not correctly save multiple values

Upgrade considerations
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Automatic registration of signal handlers (Django 1.7+)
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Signal handlers for the ``wagtailsearch`` core app and ``wagtailfrontendcache`` contrib app are automatically registered when using Django 1.7. Calls to ``register_signal_handlers`` from your ``urls.py`` can be removed.