Since it satisfied the condition stated on the wiki, I proceeded the installation, but while I was installing the package bigbluebutton I get the error:
Unpacking bbb-record-core (from .../bbb-record-core_0.80ubuntu107_amd64.deb) ...
ERROR: While executing gem ... (ArgumentError)
invalid byte sequence in US-ASCII
And then the installation failed.
So I removed the definition of LC_ALL from /etc/default/locale, reboot the server, tried again, and then it worked.
If my logic is correct, we should change the documentation to be more explicit that the content of /etc/default/locale must be ONLY "LANG=en_US.UTF-8".
Also, I think that the packaging should check if the file content isn't correct and fail immediately.
The same is valid for 0.81dev, I suppose. I don't think that makes sense to change the packaging of 0.8 during this pre-beta phase, but it could be address on 0.81dev (and consequently on 0.81).
What do you think about these ideas?