[boost] Bug #3831

Hi there, I'm attempting to use the JSON parser to read in a JSON file, but I am running up against the problem described in bug #3831<https://svn.boost.org/trac/boost/ticket/3831>, even though this bug has been marked as fixed. The milestone on the ticket is marked as 'Boost 1.42.0', but is has a score through it and I'm not sure if that means it's been fixed in that milestone or if it's been retargeted at a different milestone. I am using version 1.42.0-4ubuntu2 of the libraries so I am wondering if I have an outdated installation, or if there's another reason why I don't have the patched version. Can anyone shed some light this please? Thanks, Chris