The Showcase Webapp - more commonly known as the Showcase Workshop or the area that you log into to do your editing - was updated yesterday.
Release 4.3 includes:
- Support for webm video format

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We've streamlined the file upload process so you won't see any more of these obnoxious little "file is ready" alerts. 
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When you rename a Showcase but have not published it the old name / title will be sent to your users' devices. 
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The Users screen will now sort group names alphabetically instead of defaulting to the order that you created them. 
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We've enhanced the editing options for users that are still in 'Invite' state but haven't yet accepted their invitation to your Workshop 
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There was a bug that prevented Administrators from using the "sort by invited users" option on the users screen. That's fixed. 
Rock on!