[Trisquel-users] Problem with gThumb version

[rochefort . benjamin]

How come the version of gThumb that is displayed in Help/About is 2.10.11,  
when it is 3:2.11.2.1.is.2.10.11-0ubuntu1 that is installed according to  
Synaptic?

2.10.11 as fewer functionalities than 2.11.2.1 (or at least it seems to me if  
I compare gThumb/Taranis with gThumb/openSUSE), so I would really like to  
have the latest version.

deb packaging is new to me (I'm used to openSUSE and rpms), so the reason may  
be obvious but I can't see it!

Thanks for your help.