We have found a solution to the XSLTPROC issue now. You can test it out by:
* Download both the files
http://bbh-001.boitho.com/div/boitho-fileFilter-1.4.3-1.i386.rpm
http://bbh-001.boitho.com/div/boitho-bbdn-1.8.46-1.i386.rpm
* Then go to Software updates->Advanced in the admin panel and install the rpms one at a time
* Start the crawl again