Following this discussion:

http://forums.zotero.org/discussion/2052/runtime-error/

Here is a sample document with the error (docx, doc). To reproduce it just try to insert a citation on page 8 (On some pages it is not reproducible).
I was not able to figure out what makes it happen, but there seems to be a bug on VB code somewhere… (word or zotero?)

Regards,

μο.
p.s. here is the error screen and another doc file that I created:doc2 (see my first comment)

zotero - run-time error 5891.JPG