if I have 2 matrices - row matrix & col matrix, then the seq, first, map, and other functions behaves the same for them, although this is incorrect (imho):

(def m2 (matrix [[1 2 3]]))
m2
A 1x3 matrix
-------------
1.00e+00 2.00e+00 3.00e+00

(def m3 (matrix [1 2 3]))
m3
A 3x1 matrix
-------------
1.00e+00
2.00e+00
3.00e+00

(first m2)
1.0
(first m3)
1.0
(matrix (seq m2))
A 3x1 matrix
-------------
1.00e+00
2.00e+00
3.00e+00
(matrix (seq m3))
A 3x1 matrix
-------------
1.00e+00
2.00e+00
3.00e+00

This breaks some functions in incanter that process matrices on per-row basis. I think, that this relates to issue #30