Version:            (using KDE KDE 3.5.7)
Installed from:    Fedora RPMs
Compiler:          gcc 4.1.2 
OS:                Linux

I have a mime-type 'text/x-chdr' set up associated with the *.h file pattern, description 'C header file'. I had a mime-type 'text/x-ohdr' set up associated with the *.mh file pattern, description 'Objective C header file'. I noticed that some of my header files showed up in Konqueror as C header files and others as Objective C header files. I deleted the Objective C header mime-type and those files are now typed as unknown.

I created a new header file ( touch new-file.h) and (using Kate) I copied the contents of a header file recognised as a C header file. Konqueror typed my file correctly (C header file). I now replaced the contents of the file with the contents of a header file not typed correctly (content shown below). Konqueror now does not type the file correctly. I added the contents of the previous file to the top of the new file and the file type is correct. 

contents of the file:
=====================
/***************************************************************************
             Transpread "Tidal Creek" Fertilizer Spreader System

                          contr_db.h  -
                             -------------------
    begin                : 15 Apr 2007
    copyright            : (C) 2007 by Transpread International Ltd
    email                : services@transspread.com
 ***************************************************************************/

#ifndef CONTR_DB_H
#define CONTR_DB_H

int fetch_record( RECORD_IDX rec_idx, void * record );
int update_record( RECORD_IDX rec_idx, void * record );
int new_record( RECORD_IDX rec_idx, void * record );
int del_record( RECORD_IDX rec_idx, void * record );

int fetch_list_iter( VIEW_IDX view_idx, PLIST_ENTRY entry );
int fetch_list_record( VIEW_IDX view_idx, PLIST_ENTRY record );

int create_db_thread( char *db_name );
int delete_db_thread( void );

#endif

#ifndef

============================================

This file is correctly typed. If I remove the last #ifndef characters (or even just the 'f') Konqueror now types the file incorrectly. NB the '#ifndef' line is the only remaining text from the file that was typed correctly.

Any suggestions or input is greatly appreciated.

Thanks