Dear experts,

I'm upgrading Mapserver from 4.2 to 5.2 and experiencing a very annoying problem.

There appears a horizontal line at the edge of the map drawn by Mapserver 5.2 when the symbol is set to "circle". This didn't happen with Mapserver 4.2.
When I change the symbol to "square", the line doesn't appear.

I've tried various settings (e.g. SIZE, ANGLE, ANTIALIAS etc.) with no luck.

Does anyone have any idea what's wrong with it?

** Examples: **
Mapserver 5.2 with circle symbol:
http://seamap-dev.env.duke.edu/seamap2/main/seamap2_gm.php?sid=horizontal_line_with_circle&mode=draw_map&outputformat=PNG24&layer_name=dist_sp_01deg&layer_type=point&mapsize=256%2B256&mapext=-90%2C27.059125784374068%2C-84.375%2C31.95216223802497

Mapserver 5.2 with square symbol:
http://seamap-dev.env.duke.edu/seamap2/main/seamap2_gm.php?sid=no_line_with_square&mode=draw_map&outputformat=PNG24&layer_name=dist_sp_01deg&layer_type=point&mapsize=256%2B256&mapext=-90%2C27.059125784374068%2C-84.375%2C31.95216223802497

** Mapserver info. **
./mapserv -v
MapServer version 5.2.0 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=ICONV SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=GEOS INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

** Mapfile exerpt **

MAP
  EXTENT -20001364 -15000982 20001253 15000982
  IMAGECOLOR 255 255 255
  IMAGETYPE gif
  SYMBOLSET "/var/www/seamap2/map/symbolset.map"
  SHAPEPATH "/data/shapefiles/"
  SIZE 256 256
  STATUS ON
  TRANSPARENT TRUE
  UNITS DD
  NAME "SEAMAP ONLINE MAPPER"
  PROJECTION
    "init=epsg:54004"
  END

  LAYER
    CLASSITEM "_sp_tsn"
    CONNECTION "host=***"
    CONNECTIONTYPE POSTGIS
    DATA "_geom from (***) ***"
    NAME "zd_35"
    PROJECTION
      "init=epsg:4326"
    END
    STATUS ON
    TOLERANCE 0.1
    TYPE POINT
    CLASS
      NAME "Anatidae"
      EXPRESSION "174983"
      STYLE
        ANGLE 360
        COLOR 255 255 0
        OPACITY 50
        OUTLINECOLOR 0 0 0
        SIZE 9
        SYMBOL "circle"  : annoying horizontal line appears
        #SYMBOL "square" : when square is used, no horizontal line
      END
      TITLE "174983"
    END
    ...


--
======================
  Ei Fujioka
  Research Associate
  Duke University

  (919) 613-8021
  [EMAIL PROTECTED]
======================

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