Two test images to illustrate UDIG-1474.

udig-1474.png + .prj + .pgw	a black square aligned at 3500000,5500000
udig-1474.tif			the same raster converted to GeoTIFF

$ gdalinfo udig-1474.tif
Driver: GTiff/GeoTIFF
Files: udig-1474.tif
Size is 256, 256
Coordinate System is:
PROJCS["DHDN / Gauss-Kruger zone 3",
    GEOGCS["DHDN",
        DATUM["Deutsches_Hauptdreiecksnetz",
            SPHEROID["Bessel 1841",6377397.155,299.1528128000033,
                AUTHORITY["EPSG","7004"]],
            AUTHORITY["EPSG","6314"]],
        PRIMEM["Greenwich",0],
        UNIT["degree",0.0174532925199433],
        AUTHORITY["EPSG","4314"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",9],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",3500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AUTHORITY["EPSG","31467"]]
Origin = (3500000.000000000000000,5500000.000000000000000)
Pixel Size = (1.000000000000000,-1.000000000000000)
Metadata:
  AREA_OR_POINT=Area
Image Structure Metadata:
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  ( 3500000.000, 5500000.000) (  9d 0'0.00"E, 49d38'16.14"N)
Lower Left  ( 3500000.000, 5499744.000) (  9d 0'0.00"E, 49d38'7.85"N)
Upper Right ( 3500256.000, 5500000.000) (  9d 0'12.76"E, 49d38'16.14"N)
Lower Right ( 3500256.000, 5499744.000) (  9d 0'12.76"E, 49d38'7.85"N)
Center      ( 3500128.000, 5499872.000) (  9d 0'6.38"E, 49d38'11.99"N)
Band 1 Block=256x10 Type=Byte, ColorInterp=Red
Band 2 Block=256x10 Type=Byte, ColorInterp=Green
Band 3 Block=256x10 Type=Byte, ColorInterp=Blue