Hi, I finally got round to building the AG2.3 Toolkit in a dual 64-bit IntelR Xeon processor system running Fedora Core 4 (x86_64). For that I used the globus-accessgrid x86_64 RPM that Douglas Kosovic built for Fedora 3 (Thanks!!), but I had to rebuild the gpt and the AccessGrid RPMs as Doug's would not satisfy some 64bit library dependencies. The RPMS I built on my system work fine and are available on http://people.man.ac.uk/~zzalsja2/Fedora4_64/, if anyone is interested and is also having some trouble. - Javi