[Admins]

The 64 bit thing seems to be a common problem for autopackage which only supports 32 bit environment, and if you don't have setup the right links it will not install. May be can also upload a tgz for experienced users?
For the Gtk error: It is using a few Gtk 2.6 and 2.8 features, which are already existing for quite a long time. It might be some work to install those, but it's better to enable the new stuff like syntax highlighting instead of limiting all the other people. We cannot release the source code, sorry.