It would appear that a file, or some files, are not informing Secunia PSI 2.0 that LibreOffice is fully up-to-date and it seems Secunia is 'seeing' version 220.127.116.11 instead of version 3.5.1, so it thinks LibreOffice is out-of-date and insecure.
Please discuss with Secunia what the problem is so thet either you or they can correct it.
*** Bug 47841 has been marked as a duplicate of this bug. ***
*** Bug 47926 has been marked as a duplicate of this bug. ***
Seems to be resolved
[See comment by Jais Vemmer, Secunia PSI Support, 27th Mar, 2012 10:19]