It's been working great, and then when I clicked next puzzle to start "Ligand Debut" the application closed with a backtrace and other info in the terminal where I started foldit.

It crashes consistently every time I attempt to start "Ligand Debut" tutorial. I can do the other puzzles and prior puzzles, but not "Ligand Debut".

Here is my PC, a fresh install just to play foldit:
$ uname -a
Linux davids-linux64 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Attached is the complete log file and the crash report (backtrace).

Here is the first few lines of the error including my start command:

dlotts@davids-linux64:~$ (cd /media/b0f08f8f-4cd2-4ae2-9695-a89dff6c4e0e/opt/foldit/ && ./Foldit ) &
[1] 2210
dlotts@davids-linux64:~$ *** glibc detected *** ./Foldit: double free or corruption (!prev): 0x0000000000f263f0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7e626)[0x7f473cee0626]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(_ZNSsD1Ev+0x23)[0x7f473d7cdc13]
/lib/x86_64-linux-gnu/libc.so.6(+0x3b921)[0x7f473ce9d921]
/lib/x86_64-linux-gnu/libc.so.6(+0x3b9a5)[0x7f473ce9d9a5]
cmp-binary-f4e8f9d63a52ab730e444d305369d131/game_library.so(_ZN7utility4exitERKSsiS1_i+0x200)[0x7f473c224db0]
cmp-binary-f4e8f9d63a52ab730e444d305369d131/game_library.so(_ZN4core8chemical18read_topology_fileERKSsN7utility7pointer10access_ptrIKNS0_11AtomTypeSetEEENS5_IKNS0_10ElementSetEEENS5_IKNS0_13MMAtomTypeSetEEENS5_IKNS0_8orbitals14OrbitalTypeSetEEENS5_IKNS0_14ResidueTypeSetEEE+0x137)[0x7f473c0a6197]

Thanks,
david lotts.