Error loading translator (Better BibTeX)

[Emiliano Heyns]

I'm having problems getting my development version loaded by Zotero, getting the error "Invalid or missing translator metadata JSON object in Better BibLaTeX.js". The translator code can be found at https://gist.github.com/10741a530178a457d4c4 . The header is present, and if I try to parse it using the same regular expression Zotero uses (https://gist.github.com/4c8c4aa7ca3da23221d2), I find it without issue.

[Emiliano Heyns]

I'm trying to debug the problem by installing Zotero according to https://www.zotero.org/support/dev/source_code ("Zotero for Firefox Git installations"), and I duly get the "Another program on your computer bla bla Zotero", but it lists 4.0.28.10 as the version there rather than 4.0.28.10.SOURCE, and after I grant it permission I end up with the signed version. I've unistalled Zotero and went through the procedure again, and each time I only get the signed version.