Just tried this same thing on another subject with the same result. Here are the error messages (pasted from the terminal) when attempting to open the output of 3dDeconvolve (either with or without smoothing):

++ Notice SUMA_LoadDsetFile (SUMA_Color.c:5948):
dset has no mesh parent, assigning SO
-- Error SUMA_OKassign (SUMA_Color.c:5868):
Node index range outside
0 and SO->N_Node
++ Notice SUMA_LoadDsetFile (SUMA_Color.c:5952):
Could not assign dset to SO.
Trying to assign to domain parent.
-- Error SUMA_OKassign (SUMA_Color.c:5868):
Node index range outside
0 and SO->N_Node
-- Error SUMA_LoadDsetFile (SUMA_Color.c:5954):
Cannot assign dset to SO
or its local domain parent

Thanks,
Adam