The amd64 version of empathy failed to build [1]. This is why you are unable to install it on amd64 arch machines. The i386 version did build sucessfully. That is why Connor was able to successfully install empathy on his i386 machine.
[1] http://launchpadlibrarian.net/15970325/buildlog_ubuntu-intrepid-amd64.empathy_0.23.3-1ubuntu1_FAILEDTOBUILD.txt.gz
The amd64 version of empathy failed to build [1]. This is why you are unable to install it on amd64 arch machines. The i386 version did build sucessfully. That is why Connor was able to successfully install empathy on his i386 machine.
[1] http:// launchpadlibrar ian.net/ 15970325/ buildlog_ ubuntu- intrepid- amd64.empathy_ 0.23.3- 1ubuntu1_ FAILEDTOBUILD. txt.gz