I just tried installing the 1.1.7-3 build for Oneiric(python-imaging_1.1.7-3ubuntu1_amd64.deb) which includes the above Fedora patch (I think) on my Natty installation and I get the same buffer overflow.
I just tried installing the 1.1.7-3 build for Oneiric( python- imaging_ 1.1.7-3ubuntu1_ amd64.deb) which includes the above Fedora patch (I think) on my Natty installation and I get the same buffer overflow.