cannot link against libMagick

On macports under OSX 10.5.2, transcode 1.1.0alpha7 builds fine with 
these options:

Installing transcode 
1.1.0alpha7_0+a52dec+faac+freetype+libdv+libogg+libsdl+libtheora+libvorbis+libxml2+x264+xvid

But there's a new problem with ImageMagick. Macports now uses 
ImageMagick 6.3.9-8_0+q16, and transcode "cannot link against libMagick":

port install -d transcode +a52dec +faac +freetype +imagemagick +libdv 
+libogg +libsdl +libtheora +libvorbis +libxml2 +x264 +xvid

checking whether imagemagick support is requested... yes
checking for pkgconfig support for imagemagick... yes
checking for Wand-config... /opt/local/bin/Wand-config
checking how to determine IMAGEMAGICK_CFLAGS... pkg-config
checking magick/api.h usability... yes
checking magick/api.h presence... yes
checking for magick/api.h... yes
checking how to determine IMAGEMAGICK_LIBS... pkg-config
checking for InitializeMagick in -lMagick... no

Command output:
x264                           yes
ogg                            yes
vorbis                         yes
theora                         yes
libdvdread                     yes
pvm3                           no
libdv                          yes
libquicktime                   no
lzo                            no
a52                            yes
faac                           yes
libxml2                        yes
mjpegtools                     no
sdl                            no
imagemagick                    no
libjpeg                        yes
bsdav                          no
iconv                          yes


ERROR: option '--enable-imagemagick' failed: cannot link against libMagick
libMagick can be found in the following packages:
  Wand  http://www.imagemagick.org/

Suggestions?