Platform

Ongoing infrastructure improvements.
Better error messaging for organizations using webhooks. Now, if you add an invalid webhook URL, we'll display an error message. Also, if your webhook stops working, you can return to the webhook setup page (included in the organization settings page) and we'll display the most recent error message we've received.
Fixed a bug that was preventing the removal or org admin privileges from user accounts. Now you can lock your colleagues out of the site with ease.
Fixed an error preventing organizations from uploading 'placeholder' images. If you're wondering what a placeholder image is, it's the image that we show when we want someone to upload an image of their own. We only show this image on image upload screens, so it's not a default image. Some organizations create a branded image that says 'hey, you should upload an image'. If you want to add a placeholder image for your organization, you can do so from the organization settings page (now that we've fixed that bug).

Petitions

Organization administrators can now set alternate text for petition images. This text is set from the petition's 'admin settings' page and is shown on hover. Adding alternate text for the image not only helps with accessibility, but also allows org admins to provide photo credits or descriptions where necessary.
Fixed a typo in the 'delivery' template that's included on the blast email page. Instead of "com[ing] along to the petition delivery so we can that the names on the petition are real people," we're "com[ing] along to the petition delivery so we can show that the names on the petition are real people."
Fixed an error that prevented org admins from uploading partnership images.
When a petition was map-less, image-less, and the creator chose be uncontactable, the left sidebar on the petition page was not aesthetically pleasing. We've fixed the spacing so that these petitions don't look so weird.
Fixed a bug that pushed org admins back to the first page of comments when they tried to delete a 'reason for signing' from a later page.
When a user flagged a comment on a petition page, we would show the full date + time + timezone of submission for the remaining comments. Now we keep the shortened time, because 'a day ago' just looks nicer than "2015-01-21 14:55:34 -0400"
Added a new JSON endpoint for efforts. It's a long explanation, so if you're interested, check out this article: https://controlshiftlabs.zendesk.com/hc/en-us/articles/203654067-JSONP-API.

There was a bug that was preventing group members from inviting their friends to join the group. That seemed lonely, so we now let those invitations be sent as expected.

Nothing new in events or TakeCharge.