Question: the bug with maple 14

In Maple 14

with(epsilon); > f:=[(x-u)^2+(y-v)^2-1,v^2-u^3,2*v*(x-u)+3*u^2*(y-v),(3*w*u^2-1)*(2*w*v-1)]; > printlevel:=2:

               Epsilon 0.618 (C) 2003 by Dongming Wang

[CharSet, ICS, IVD, PID, Prove, RIM, RegSer, SimSer, TriSer, Tsolve,

        dTriSer]

               2          2       2    3                   2   f := [(x - u)  + (y - v)  - 1, v  - u , 2 v (x - u) + 3 u  (y - v),

              2         (3 w u  - 1) (2 w v - 1)]

> RegSer(f,[x,y,u,v,w]);  RegSer called with arguments: [(x-u)^2+(y-v)^2-1, v^2-u^3, 2*v*(x-u)+3*u^2*(y-v), (3*w*u^2-1)*(2*w*v-1)], [x, y, u, v, w]  #(RegSer,1): sisys[regser](ps,ord) Error, (in linalg:-col) invalid arguments

 locals defined as: localA = B, i = i, m = 3, n = 6, v = v >

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But in lower version Maple 7,

it works ok, and return the right answer.