When I cut or copy and then paste text which contains any footnotes, comments or annotations, these are all lost from the pasted text.
Interestingly, if I paste that same text a second time, the footnote/comment/annotation appears correctly on the second occasion.
Running 18.104.22.168 beta (32 bit) on Ubuntu Utopic (14.10).
Needless to say, this is disastrous for academic writing. Sorry if this has been reported before - I did have a look and couldn’t see anything about it. i didn’t write heavily in previous versions of the Linux beta so I can’t say for sure how long this has been a problem. Getting this fixed would be a great holiday present.