anchor.diff:  
           FGzStream.Seek(-SizeOf(TAbGzTailRec), soFromEnd);
           GZHelp.ReadTail;
  -        Item.FCRC32 := GZHelp.FItem.FCRC32;
  +        Item.FCRC32 := GZHelp.FTail.CRC32;
  +        Item.FUncompressedSize := GZHelp.FTail.ISize
  +//        Item.CRC32 := GZHelp.FItem.FCRC32;
           Item.FUncompressedSize := GZHelp.FItem.FUncompressedSize;
   
           Item.Action := aaNone;
  
positive.code:           FileSetDate(UseName, LinuxFileTime);                           {!!.01}
            AbFileSetAttr(UseName, AB_FPERMISSION_GENERIC);                {!!.01}
            {$ENDIF}
          finally {OutStream}
            OutStream.Free;
          end; {OutStream}
  
        except
          on E : EAbUserAbort do begin
  
negative.code: type
    TAbGzipItem = class(TAbArchiveItem)
    private
  //    FCRC32: LongInt;
    protected {private}
      FGZHeader : TAbGzHeader;
      FIsText : Boolean;
  