I am the chief maintainer of GNUstep. I wrote most of AppKit and all of the InterfaceBuilder equivalent Gorm. I run the GNUstep free software project, I was appointed as it's lead by Richard Stallman.
Gorm keeps giving me segfaults when I try to drag files from it to ProjectCenter (or vice versa). Even when I open any interface builder file in Gorm, it segfaults. I run Debian Wheezy.
Ouch! I'll test this and see if I can recreate/fix it. One thing to make certain of is that you're using GNUstep from subversion. The debian packages are almost always about a year out of date, unfortunately.
Please read: http://www.gnustep.org/developers/whoiswho.html
Gregory Casamento