Converting to .doc and .xls files in Plone does not work with latest Libreoffice

System Spec:
Debian stable
Plone 4.3.4 with collective.documentviewer 3.0.2 and docsplit 0.7.6 and latest stable Libreoffice
When I try to convert some .doc or .xls documents in Plone, I get this error:

Command
/usr/local/bin/docsplit pdf /tmp/tmpTUgROI/dump.doc --output /tmp/tmpTUgROI
finished with return code
1
and output:
terminate called after throwing an instance of 'com::sun::star::uno::RuntimeException'
Aborted
/var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit/pdf_extractor.rb:33:in `libre_office?': undefined method`match' for nil:NilClass (NoMethodError)
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit/pdf_extractor.rb:128:in `block in extract'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit/pdf_extractor.rb:120:in`each'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit/pdf_extractor.rb:120:in `extract'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit.rb:65:in`extract_pdf'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit/command_line.rb:47:in `run'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/lib/docsplit/command_line.rb:37:in`initialize'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/bin/docsplit:5:in `new'
from /var/lib/gems/1.9.1/gems/docsplit-0.7.6/bin/docsplit:5:in`'
from /usr/local/bin/docsplit:23:in `load'
from /usr/local/bin/docsplit:23:in`'