this is a bug in the current org-mode 9.0.8. You have to revert it to org
9.0.7 for now. It has been fixed, but I am not sure when it will show up.

John

-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
@johnkitchin
http://kitchingroup.cheme.cmu.edu


On Wed, Jun 21, 2017 at 5:50 PM, Sharon Kimble <boudiccas@skimble.plus.com>
wrote:

>
> I've got this strange problem and I'm not sure when it started, possibly
> when this new computer was first put to use last Friday afternoon with a
> fresh install of Debian 9, or maybe before then, I'm not sure.
>
> Anyway, whenever I mouse-over a bibliographic citation in an org-mode
> document, it used to say for (cite:0072) '\Hair loss, 2015,
> http://www.regrowth.com/hair-loss-articles/ \' but now just shows
> 'LINK:cite:0072'.
>
> I am using 'org-ref' which is up to date, as is org-mode, and both from
> ELPA.
>
> This is what my bibliography item actually is -
>
> --8<---------------cut here---------------start------------->8---
> @Online{0072,
>   Title                    = {Hair loss},
>   Author                   = {regrowth},
>   Url                      = {http://www.regrowth.com/hair-loss-articles/
> },
>   Year                     = {2015}
> }
> --8<---------------cut here---------------end--------------->8---
>
> So how can I regain my previous mouse-over abilities please?
>
> Thanks
> Sharon.
> --
> A taste of linux = http://www.sharons.org.uk
> TGmeds = http://www.tgmeds.org.uk
> DrugFacts = https://www.drugfacts.org.uk
> Debian 9.0, fluxbox 1.3.5-2, emacs 25.1.1, org-mode 9.0.7
>