Not sure if this is right place to report problems, but:
Demo run fails in 2-3 seconds right after start with:
Setup: Ubuntu 12.10 AMD64, fglrx-updates proprietary drivers (not sure which version, probably Catalyst 12.10), AMD Radeon HD 6930.
[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
heaven_x64: ../../src/xcb_io.c:178: dequeue_pending_request: Assertion `!xcb_xlib_unknown_req_in_deq' failed.