[Shotwell] are commas in tagnames a problem?

[Dougie Nisbet]

I've just managed to reproduce a problem that had been eluding me. It 
has happened occasionally but on previous occurrences I hadn't spotted 
what was actually happening. Perhaps it's something to do with legal tag 
names. I also have a suspicion that it may be connected with renaming a 
tag to a complex name, and then subsequently trying to use the new tag 
name on new images.

Take the example tag of: Kretzschmaria deusta (Brittle Cinder, Charcoal 
Fungus)

Select two images, press Ctrl-T, and start typying the tag. In my setup, 
I am offered two choices;
     Kretzschmaria
     Kretzschmaria deusta (Brittle Cinder, Charcoal Fungus)

That's fine. That's what I expect and want, so I keep typing to get the 
unique match, then select OK.

At this point (in my setup) something odd happens and, as I say, I've 
only just spotted it, as on previous occasions I think I must have 
assumed the tagging had worked correctly and just carried on. What 
happens is that the tag is interpreted as two new tags:
     Kretzschmaria deusta (Brittle Cinder
     Charcoal Fungus)

so my guess is that the comma in the tag name was interpreted as a tag 
delimiter in this situation. However I do have lots of images tagged 
(correctly) with this tag, and my suspicion is that I renamed the tag at 
some time and the images have been accurately updated.

The two 'new' tags appear as top-level tags.

I've uploaded a video of this happening to 
http://www.katsura.myzen.co.uk/shotwell_legal_tagnames.ogv
and also to http://www.fellandforest.co.uk/p326476854/e2a4febf1 but the 
quality seems a lot better in the first one.

  Dougie