i noticed section 2.3.4.4 where it says that the last dimension shall never be one (except in the case of dim[0]), and i noticed that my freesurfer gifti io code was violating that rule. i have since fixed that. i have always called gifti_valid_gifti_image while reading and before writing, but i just noticed that the routine gifti_valid_dims does not check for the dim = 1 rule.

so my suggestion is, can gifti_valid_dims be modified to check for dim[] = 1 (except dim[0] is allowed to be 1) and return error?