diff --git a/panda/src/pnm/bitio.c b/panda/src/pnm/bitio.c
index 804cdaf787..40dc97f16f 100644
--- a/panda/src/pnm/bitio.c
+++ b/panda/src/pnm/bitio.c
@@ -1,6 +1,4 @@
-/*\
- * $Id$
- *
+/*
  * bitio.c - bitstream I/O
  *
  * Works for (sizeof(unsigned long)-1)*8 bits.
@@ -13,33 +11,7 @@
  * that both that copyright notice and this permission notice appear
  * in supporting documentation.  This software is provided "as is"
  * without express or implied warranty.
- *
- * $Log$
- * Revision 1.3  2001/06/14 01:16:55  cxgeorge
- * fix warnings
- *
- * Revision 1.2  2001/05/25 16:13:01  drose
- * *** empty log message ***
- *
- * Revision 1.1.1.1  2000/10/04 01:14:42  drose
- *
- *
- * Revision 1.5  1992/11/24  19:36:46  dws
- * Added copyright.
- *
- * Revision 1.4  1992/11/17  03:37:50  dws
- * updated comment
- *
- * Revision 1.3  1992/11/10  23:15:16  dws
- * Removed superfluous code.
- *
- * Revision 1.2  1992/11/10  23:11:22  dws
- * Generalized to handle more than one bitstream at once.
- *
- * Revision 1.1  1992/11/10  18:33:21  dws
- * Initial revision
- *
-\*/
+ */
 
 #include "bitio.h"
 #include <assert.h>
diff --git a/panda/src/pnm/bitio.h b/panda/src/pnm/bitio.h
index 5674c439ed..2a2a713027 100644
--- a/panda/src/pnm/bitio.h
+++ b/panda/src/pnm/bitio.h
@@ -1,6 +1,4 @@
 /*\
- * $Id$
- *
  * bitio.h - bitstream I/O
  *
  * Works for (sizeof(unsigned long)-1)*8 bits.
@@ -13,26 +11,6 @@
  * that both that copyright notice and this permission notice appear
  * in supporting documentation.  This software is provided "as is"
  * without express or implied warranty.
- *
- * $Log$
- * Revision 1.2  2001/05/25 15:59:19  drose
- * remove tab characters
- *
- * Revision 1.1.1.1  2000/10/04 01:14:42  drose
- *
- *
- * Revision 1.4  1992/11/24  19:37:02  dws
- * Added copyright
- *
- * Revision 1.3  1992/11/17  03:37:59  dws
- * updated comment
- *
- * Revision 1.2  1992/11/10  23:10:22  dws
- * Generalized to handle more than one bitstream at a time.
- *
- * Revision 1.1  1992/11/10  18:33:51  dws
- * Initial revision
- *
 \*/
 
 #ifndef _BITIO_H_
diff --git a/panda/src/pnmimagetypes/pnmFileTypeBMPReader.cxx b/panda/src/pnmimagetypes/pnmFileTypeBMPReader.cxx
index a47eb169c4..3aaefd3332 100644
--- a/panda/src/pnmimagetypes/pnmFileTypeBMPReader.cxx
+++ b/panda/src/pnmimagetypes/pnmFileTypeBMPReader.cxx
@@ -25,9 +25,7 @@ extern "C" {
 }
 
 // Much code in this file is borrowed from Netpbm, specifically bmptoppm.c.
-/*\
- * $Id$
- *
+/*
  * bmptoppm.c - Converts from a Microsoft Windows or OS/2 .BMP file to a
  * PPM file.
  *
@@ -42,53 +40,7 @@ extern "C" {
  * that both that copyright notice and this permission notice appear
  * in supporting documentation.  This software is provided "as is"
  * without express or implied warranty.
- *
- * $Log$
- * Revision 1.4  2001/05/25 21:30:42  drose
- * Update copyright header
- *
- * Revision 1.3  2001/05/25 15:59:19  drose
- * remove tab characters
- *
- * Revision 1.2  2000/11/09 21:14:02  drose
- * *** empty log message ***
- *
- * Revision 1.1.1.1  2000/10/04 01:14:42  drose
- *
- *
- * Revision 1.10  1992/11/24  19:38:17  dws
- * Added code to verify that reading occurred at the correct offsets.
- * Added copyright.
- *
- * Revision 1.9  1992/11/17  02:15:24  dws
- * Changed to include bmp.h.
- * Eliminated need for fseek(), and therefore the need for a
- * temporary file.
- *
- * Revision 1.8  1992/11/13  23:48:57  dws
- * Made definition of Seekable() static, to match its prototype.
- *
- * Revision 1.7  1992/11/11  00:17:50  dws
- * Generalized to use bitio routines.
- *
- * Revision 1.6  1992/11/10  23:51:44  dws
- * Enhanced command-line handling.
- *
- * Revision 1.5  1992/11/08  00:38:46  dws
- * Changed some names to help w/ addition of ppmtobmp.
- *
- * Revision 1.4  1992/10/27  06:28:28  dws
- * Corrected stupid typo.
- *
- * Revision 1.3  1992/10/27  06:17:10  dws
- * Removed a magic constant value.
- *
- * Revision 1.2  1992/10/27  06:09:58  dws
- * Made stdin seekable.
- *
- * Revision 1.1  1992/10/27  05:31:41  dws
- * Initial revision
-\*/
+ */
 
 /*
  * Utilities
diff --git a/panda/src/pnmimagetypes/pnmFileTypeBMPWriter.cxx b/panda/src/pnmimagetypes/pnmFileTypeBMPWriter.cxx
index 7b27bd493d..c2382dc8a1 100644
--- a/panda/src/pnmimagetypes/pnmFileTypeBMPWriter.cxx
+++ b/panda/src/pnmimagetypes/pnmFileTypeBMPWriter.cxx
@@ -29,9 +29,7 @@ extern "C" {
 }
 
 // Much code in this file is borrowed from Netpbm, specifically ppmtobmp.c.
-/*\
- * $Id$
- *
+/*
  * ppmtobmp.c - Converts from a PPM file to a Microsoft Windows or OS/2
  * .BMP file.
  *
@@ -46,53 +44,7 @@ extern "C" {
  * that both that copyright notice and this permission notice appear
  * in supporting documentation.  This software is provided "as is"
  * without express or implied warranty.
- *
- * $Log$
- * Revision 1.6  2001/08/02 21:26:39  drose
- * fix bmp-bpp when requested size is too small
- *
- * Revision 1.5  2001/08/02 20:01:58  drose
- * add bmp-bpp
- *
- * Revision 1.4  2001/05/25 21:30:42  drose
- * Update copyright header
- *
- * Revision 1.3  2001/05/25 15:59:19  drose
- * remove tab characters
- *
- * Revision 1.2  2000/11/09 21:14:02  drose
- * *** empty log message ***
- *
- * Revision 1.1.1.1  2000/10/04 01:14:42  drose
- *
- *
- * Revision 1.9  1992/11/24  19:39:33  dws
- * Added copyright.
- *
- * Revision 1.8  1992/11/17  02:16:52  dws
- * Moved length functions to bmp.h.
- *
- * Revision 1.7  1992/11/11  23:18:16  dws
- * Modified to adjust the bits per pixel to 1, 4, or 8.
- *
- * Revision 1.6  1992/11/11  22:43:39  dws
- * Commented out a superfluous message.
- *
- * Revision 1.5  1992/11/11  05:58:06  dws
- * First version that works.
- *
- * Revision 1.4  1992/11/11  03:40:32  dws
- * Moved calculation of bits per pixel to BMPEncode.
- *
- * Revision 1.3  1992/11/11  03:02:34  dws
- * Added BMPEncode function.
- *
- * Revision 1.2  1992/11/08  01:44:35  dws
- * Added option processing and reading of PPM file.
- *
- * Revision 1.1  1992/11/08  00:46:07  dws
- * Initial revision
-\*/
+ */
 
 #define MAXCOLORS 256