I decided to take another crack at learning GEM today, and have immediately hit a snag. I'm using the 64-bit build of Pd-extended 0.43.4 from apt.puredata.info with the KXStudio distro (based on Ubuntu 12.04). Whenever I try to create a GEM window, it flashes for a fraction of a second and closes. With messages set to all, the Pd window says:

Any thoughts on why this is happening and how to fix it?

.mmb