[pstricks] pst-circ problem circuit

[Joel Salomon]

Hi, all.

I've been trying to use pst-circ for a school lab report, an I'm using
the following code (extracted from a larger LaTeX doc):

\begin{figure}[h!]
	\centering
\begin{pspicture}(0,0)(12,2)
\psgrid[subgriddiv=1,griddots=10]
	\pnode(8,.5){nuln}
	\pnode(8,1.5){nulp}
	\pnode(7,.5){vn2}
		\uput[l](vn2){$v_n$}
		\wire[intensitylabel=$i_n$,arrows=o-*](vn2)(nuln)
	\pnode(7,1.5){vp2}
		\uput[l](vp2){$v_p$}
		\wire[intensitylabel=$i_p$,arrows=o-*](vp2)(nulp)
\end{pspicture}
	\caption{Ideal Op-Amp} 
	\label{Ideal Op-Amp} 
\end{figure}

There was more to the circuit, but this part displays my problem.

Why are the intensity labels a full half-division above the wires, and
why do they have copies of the arrowheads next to them? Is this a bug
or am I doing something wrong?

--Joel