I have also last Ubuntu Gutsy (7.10) version for AMD64 processor. Game works fine (compiled dev2.3 from trunk), but there is mess with GtkRadiant. I was able to unpack and run a compiled version from site of UFO AI beta versions, but it will crash in doing anything related in save or load/import. Downloading from radiant official repository and compiling gives errors also after installing needed dependencies. Or maybe I have still missed omething, because it claims:
sh: xml2-config: not found
In file included from contrib/shaderplug/shaderplug.h:25,
from contrib/shaderplug/shaderplug.cpp:22:
libs/xml/xmltextags.h:31:26: error: libxml/xpath.h: No such file or directory
libs/xml/xmltextags.h:32:30: error: libxml/xmlwriter.h: No such file or directory
Do you or anyone has working order GtkRadiant in Ubutu 64 bit version? It's so ugly to change between Vista and Ubuntu for this.