A couple notes for Linux users who wish to use PDF fulltext indexing:

1) x86_64 binaries are now available via the installer in the Search pane of the Zotero prefs.

2) The installer was previously being sent a 64-bit pdfinfo binary on 32-bit Linux systems, so users of 32-bit systems who already installed the Xpdf tools via the installer should remove pdfinfo-Linux-i686 and pdfinfo-Linux-i686.version from their Zotero data directories, restart Firefox, and go to the Zotero prefs to download a new version of pdfinfo. Without a working pdfinfo binary, Zotero is unable to provide a page count for PDF files and properly determine indexing status.

Let us know if you have any trouble using PDF indexing on Linux.