I'm running into an issue with FLASH 2D data, namely that occasionally a grid will end up with a z-position of 0.5 instead of domain_left_edge+0.5. Since most of the grids are at the latter location in z, this messes up slices.
Nathan has traced the problem to frontends/flash/data_structures.py, in particular the for loop at line 146. It looks like I'm catching an edge case where na.rint rounds .4999999... to 0 instead of 0.5 to 1.
A data file which exhibits this issue is available here: http://www.ucolick.org/~jforbes/cloud_hdf5_plt_cnt_0000
For the record I'm using revision 1a3c927ef00c of the development branch.
Thank you, John Forbes