What PDF Specification Version?

"goodconsumer" <goodconsumer-/[email protected]> Tue, 17 Jun 2008 19:00:02 -0000
Newsgroups gmane.comp.lang.perl.modules.pdfapi2
Message-ID <[email protected]>
I was reading in some version 1.5 PDF's and ran into an error in PDF
File in the readxrtr method - "Malformed xref in PDF file."

We're currently using Revision 1.83 and would like to know if updating
the version of PDF::API2 would all it to work with version 1.5 PDF's.