hi,
since there are quite a few folks here using VMD for visualizing
LAMMPS trajectories, i would like to draw your attention to a bugfix
for reading trajectories of triclinic systems with negative tilt
factors. thanks to bart vorselaars for reporting this problem and
providing a corrected version. you can download a standalone version
of the plugin (set up to be compiled on linux) for updating your
existing VMD installation here.
the change will, of course, be included into the next official VMD
release (1.9.2).
axel.