QGIS » QGIS Application

When I try to load or visualize raster ortophoto with rotation parameter in the header file (tfw) qgis is freezing for 40-50 sec. I have to wait the same time for every pan/refresh operation.
If the rotation parameters is set to zero the image is loaded just in few second.
The same raster (with rotation parameters) works fine with others GIS application, as udig for example.
The italian list suggest me to open a ticket.
I attach a jpg version of the image to limit the size

This is the GeoTIFF info:

Driver: GTiff/GeoTIFF
Files: 0021_00211001_rgb.tif
Size is 7680, 13824
Coordinate System is:
PROJCS["WGS 84 / UTM zone 32N",
    GEOGCS["WGS 84",
        DATUM["WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,
                AUTHORITY[[EPSG""7030]],
            AUTHORITY[[EPSG""6326]],
        PRIMEM[[Greenwich]],
        UNIT[[degree]],
        AUTHORITY[[EPSG""4326]],
    PROJECTION[[Transverse_Mercator]],
    PARAMETER[[latitude_of_origin]],
    PARAMETER[[central_meridian]],
    PARAMETER[[scale_factor]],
    PARAMETER[[false_easting]],
    PARAMETER[[false_northing]],
    UNIT["metre",1,
        AUTHORITY[[EPSG""9001]],
    AUTHORITY[[EPSG""32632]]
[[GeoTransform]] =
  32339334.7755, 0.249, 0.018
  5003594.055500001, 0.018, -0.249
Metadata:
  EXIF_BitsPerSample=16 16 16
  EXIF_Compression=1
  EXIF_PhotometricInterpretation=2
  EXIF_Orientation=1
  EXIF_SamplesPerPixel=3
  EXIF_XResolution=(833.333)
  EXIF_YResolution=(833.333)
  EXIF_PlanarConfiguration=1
  EXIF_ResolutionUnit=3
  EXIF_Software=Adobe Photoshop CS2 Windows
  EXIF_DateTime=2008:10:16 08:59:35
  EXIF_ColorSpace=65535
  EXIF_PixelXDimension=7680
  EXIF_PixelYDimension=13824
  AREA_OR_POINT=Area
Image Structure Metadata:
  COMPRESSION=DEFLATE
  INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left  (32339334.776, 5003594.056) (129d24'8.65"W,Invalid angle)
Lower Left  (32339583.608, 5000151.880) ( 78d11'7.42"W,Invalid angle)
Upper Right (32341247.096, 5003732.296) ( 68d14'50.72"W,Invalid angle)
Lower Right (32341495.928, 5000290.120) (  6d30'39.61"W,Invalid angle)
Center      (32340415.352, 5001942.088) (120d44'35.31"E,Invalid angle)
Band 1 Block=256x256 Type=Byte, [[ColorInterp]]=Red
  Overviews: 3840x6912, 1920x3456, 960x1728, 480x864
Band 2 Block=256x256 Type=Byte, [[ColorInterp]]=Green
  Overviews: 3840x6912, 1920x3456, 960x1728, 480x864
Band 3 Block=256x256 Type=Byte, [[ColorInterp]]=Blue
  Overviews: 3840x6912, 1920x3456, 960x1728, 480x864