Slack (Beta) has been updated on Windows Phone this evening, finally adding in support for file uploads, along with a few fixes. Here's the full breakdown of what's new from the Slack team, along with the known issues with this build:
WHAT'S FIXED:
- Better handling of connectivity changes and app resuming. We still have work to do so it's faster & more reliable, but this should be an improvement
- Properly notifying the users if authentication settings changed and a re-login in required
- Badges and tiles clear more frequently
Full story from the WindowsCentral blog...