Created attachment 4168 [details]
Screenshot illustrating the problem
Now the information about tab is missing (cf. screenshot).
The reason are changes to addbiblio template after introducing Template::Toolkit (cf. also Bug 6257).
A patch will follow.
Created attachment 4169 [details] [review]
I am not sure what's wrong but your patch didn't apply for me:
git am -i -3 -s
Patch format detection failed.
I see it's also missing your name and some other things normally given on top of the patch. Perhaps you want to check your git configuration.
Created attachment 4182 [details] [review]
Proposed patch (with the header)
Created attachment 4196 [details] [review]
Signed off patch
T::T bug, pushed please test
The number of the tab of a missing field is now displayed correctly.