that's the DOI translator failing - apparently there is not currently a working Springerlink translator, Zotero tries to work with the DOI on the page and that lookup fails - either because crossref is down or - more likely - because the DOI isn't (yet) registered with CrossRef or is wrong.
It worked until about a week ago. Since then Springerlink changed the page design. Prob. the translator needs to be adjusted.
Would be happy if someone could do this since I am using it a lot.
I just got an answer from the SpringerLink support team. They are working on a citation export function. So soon you will find a button to click on exporting all BibTeX information. You can import this in Zotero afterwards. That will be a work-around.
'export to BibTeX, then import' doesn't really fix my use case: one of the reasons I use Zotero is that I can get the bibliographic info AND the PDF in one click.
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Would be happy if someone could do this since I am using it a lot.
My guess is that this is trying to fire on DOI:
http://www.springerlink.com/content/k7084020x5791357/
since 'add by DOI' also fails for
10.1007/978-3-642-15515-4_23
even though http://dx.doi.org/10.1007/978-3-642-15515-4_23 resolves.
'export to BibTeX, then import' doesn't really fix my use case: one of the reasons I use Zotero is that I can get the bibliographic info AND the PDF in one click.
Anybody got time to fix the translator?
But yes, it's using the DOI translator.