--- gdcmDocument.cxx	2004-11-16 15:11:19.052849007 +0100
+++ gdcmDocument.cxx.secu	2004-11-16 14:57:32.090682903 +0100
@@ -429,13 +429,8 @@
    uint16_t zero;
    Fp->read((char*)&zero,  (size_t)2 );
  
-   //ACR -- or DICOM with no Preamble; may start with a Shadow Group --
-   if( 
-       zero == 0x0001 || zero == 0x0100 || zero == 0x0002 || zero == 0x0200 ||
-       zero == 0x0003 || zero == 0x0300 || zero == 0x0004 || zero == 0x0400 ||
-       zero == 0x0005 || zero == 0x0500 || zero == 0x0006 || zero == 0x0600 ||
-       zero == 0x0007 || zero == 0x0700 || zero == 0x0008 || zero == 0x0800			 		 	
-	)
+   //ACR -- or DICOM with no Preamble --
+   if( zero == 0x0008 || zero == 0x0800 || zero == 0x0002 || zero == 0x0200 )
    {
       return Fp;
    }
@@ -2541,13 +2536,13 @@
          // So, let's check if this file wouldn't happen to be 'dirty' ACR/NEMA,
          //  i.e. the 'group length' element is not present :     
          
-         //  check the supposed-to-be 'group number'
-         //  in ( 0x0001 .. 0x0008 )
+         //  check the supposed to be 'group number'
+         //  0x0002 or 0x0004 or 0x0008
          //  to determine ' SwapCode' value .
          //  Only 0 or 4321 will be possible 
          //  (no oportunity to check for the formerly well known
          //  ACR-NEMA 'Bad Big Endian' or 'Bad Little Endian' 
-         //  if unsuccessfull (i.e. neither 0x0002 nor 0x0200 etc -3, 4, ..., 8-) 
+         //  if unsuccessfull (i.e. neither 0x0002 nor 0x0200 etc -4, 8-) 
          //  the file IS NOT ACR-NEMA nor DICOM V3
          //  Find a trick to tell it the caller...
       
@@ -2555,25 +2550,15 @@
       
          switch ( s16 )
          {
-            case 0x0001 :			
             case 0x0002 :
-            case 0x0003 :				
             case 0x0004 :
-            case 0x0005 :
-            case 0x0006 :	
-            case 0x0007 :												
             case 0x0008 :      
                SwapCode = 0;
                Filetype = ACR;
                return true;
-            case 0x0100 :			
             case 0x0200 :
-            case 0x0300 :				
             case 0x0400 :
-            case 0x0500 :
-            case 0x0600 :	
-            case 0x0700 :												
-            case 0x0800 :  
+            case 0x0800 : 
                SwapCode = 4321;
                Filetype = ACR;
                return true;
@@ -2592,7 +2577,6 @@
    }
 }
 
-
 /**
  * \brief Restore the unproperly loaded values i.e. the group, the element
  *        and the dictionary entry depending on them.