We can't go backwards to a vulnerable version. Please post about this in the packagers' board. I know someone (Uelsk8s?) has had success building Pidgin packages for VL 6.0 against the new gnutls. You can also rebuild the fox package using my build script for 6.0 against the new gnutls. That did work for me on 6.0. I don't have a VL 5.9 machine anymore so I can't do the rebuilds.
eMachines EL-1300G desktop, 1.6GHz AMD Athlon 2650e CPU, 4GB RAM, nVidia GeForce 6150 SE video
CentOS 6.5 (will try VL64-7.1 soon)
Toshiba Satellite A135-S4727, Intel Pentium T2080 / 1.73 GHz, 2GB RAM, Intel GMA 950
HP Mini 110 netbook, 1.6GHz Intel Atom CPU, 2GB RAM, Intel 950 video, VL 7.1