Possible bug: 2.1b4 sync warning: file editing denied for group

After resetting my sync data, and attempting to restore my local data to Zotero.org with 2.1b4 (FF4.0 b9 and/or standalone Zotero) I get an error saying I no longer have edit access to the group in question (https://www.zotero.org/groups/10248)

I can manage the group fine from the web interface (i.e. I am an admin) and I've checked my sync credentials, and they're correct

Exact warning:
You no longer have file editing access to the Zotero group 'DFW', and files you've added or edited cannot be synced to the server.

If you continue, your copy of the group will be reset to its state on the server, and local modifications to items and files will be lost.

If you would like a chance to copy your changes elsewhere or to request write access from a group administrator, cancel the sync now.

This is an old discussion that has not been active in a long time. Instead of commenting here, you should start a new discussion. If you think the content of this discussion is still relevant, you can link to it from your new discussion.