The 2.6.1 amd64 patch does not apply cleanly. I have modified it to apply cleanly, and a friend with an amd64 box applied and compiled with it. He said he hasn't had any problems with it so far, so I am submitting for further review. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Created attachment 65042 [details] gtk+ 2.7.4 patch that applies cleanly. (some fuzz)
That patch works fine for me on gtk+-2.7.4 on amd64. Commenting the patch out also worked, but this is probably better.
New patch addded to gtk+-2.8.0-r1.