diff --git a/ChangeLog b/ChangeLog
index edaf895fa..0c5ed8d6e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-10-25  Nicolas Martin <nicols-guest at users.alioth.debian.org>
+	* backend/pixma_mp150.c, doc/sane-pixma.man doc/descriptions/pixma.desc:
+	Tweaks for TPU scan at 4800 dpi, and MP810 at 2400 dpi (now works).
+	Updated docs around that.
+
 2008-10-25 Louis Lagendijk  <llagendijk-guest at users.alioth.debian.org>
         * Added configuration  file support for pixma backend
 	Currently used only for configuration of network scanners.
diff --git a/backend/pixma_mp150.c b/backend/pixma_mp150.c
index d3a907538..2e405ba5f 100644
--- a/backend/pixma_mp150.c
+++ b/backend/pixma_mp150.c
@@ -527,13 +527,18 @@ calc_shifting (pixma_t * s)
   switch (s->cfg->pid)
     {
       case MP970_PID:	/* MP970 at 4800 dpi */
-        if (s->param->xdpi == 4800) 
-          mp->stripe_shift = 3;
-          break;
+        if (s->param->xdpi == 4800)
+          {
+             if (is_scanning_from_tpu(s))
+               mp->stripe_shift = 6;
+             else
+               mp->stripe_shift = 3;
+           }
+        break;
       case MP810_PID:
         if (s->param->xdpi == 2400) 
           mp->stripe_shift = 3;
-          break;
+        break;
       case MP800_PID:
       case MP830_PID:
       case MP960_PID:
@@ -856,10 +861,11 @@ shift_colors (uint8_t * dptr, uint8_t * sptr,
   
   for (i = 0; i < w; i++)
     {
+      st = 0;
       /* MP970 at 4800 dpi exception stripes shift */
-      st = (pid == MP970_PID && dpi == 4800 && (i % 2) == 0) ? strshft : 0;
+      if (pid == MP970_PID && dpi == 4800 && i % 2 == 0) st = strshft;
       /* MP810 at 2400 dpi exception stripes shift */
-      st = (pid == MP810_PID && dpi == 2400 && (i % 2) == 0) ? strshft : 0;
+      if (pid == MP810_PID && dpi == 2400 && i % 2 == 0) st = strshft;      
         
       *sptr++ = *(dptr++ + sr + st);
       if (c == 6) *sptr++ = *(dptr++ + sr + st);
@@ -918,6 +924,7 @@ mp970_reorder_pixels (uint8_t * linebuf, uint8_t * sptr, unsigned c,
   memcpy (sptr, linebuf, line_size);
 }
 
+#ifndef TPU_48
 static unsigned
 pack_48_24_bpc (uint8_t * sptr, unsigned n)
 {
@@ -936,6 +943,7 @@ pack_48_24_bpc (uint8_t * sptr, unsigned n)
     }
   return (n / 2);
 }
+#endif
 
 /* This function deals both with PIXMA CCD sensors producing shifted color 
  * planes images, Grayscale CCD scan and Generation 3 high dpi images.
diff --git a/doc/descriptions/pixma.desc b/doc/descriptions/pixma.desc
index 47cd68256..6f46bf806 100644
--- a/doc/descriptions/pixma.desc
+++ b/doc/descriptions/pixma.desc
@@ -152,7 +152,7 @@
 :interface "USB"
 :usbid "0x04a9" "0x171a"
 :status :good
-:comment "All resolutions supported up to 1200 dpi. Vertical lines issue at 2400 and 4800 dpi, can these modes be handled? USB Snoops needed for TPU film scan."
+:comment "All resolutions supported up to 4800 dpi (but vertical lines issue at 4800 dpi). USB Snoops needed for TPU film scan."
 
 :model "PIXMA MP830"
 :interface "USB"
@@ -169,7 +169,7 @@
 :interface "USB"
 :usbid "0x04a9" "0x1726"
 :status :good
-:comment "All resolutions supported (up to 4800DPI). TPU support currently experimental."
+:comment "All resolutions supported (up to 4800DPI). Full TPU support (negativa and slides) at 24 or 48 bits."
 
 :model "SmartBase MP360"
 :interface "USB"
diff --git a/doc/sane-pixma.man b/doc/sane-pixma.man
index 42b5da0b5..277378db7 100644
--- a/doc/sane-pixma.man
+++ b/doc/sane-pixma.man
@@ -1,4 +1,4 @@
-.TH "sane\-pixma" "5" "11 Oct 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
+.TH "sane\-pixma" "5" "25 Oct 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
 .IX sane\-pixma
 .SH NAME
 sane\-pixma \- SANE backend for Canon PIXMA MP series
@@ -70,7 +70,7 @@ The backend supports
 .br
 * Automatic Document Feeder (Duplex for some models).
 .br
-* Transparency Unit.
+* Transparency Unit, 24 or 48 bits depth.
 .PP
 The device name is in the form pixma:xxxxyyyy_zzzzz
 where x, y and z are vendor ID, product ID and serial number respectively.
@@ -137,9 +137,9 @@ the verbosity.
 .br
 3  print debug-level messages
 .br
-10 dump USB traffics
+11 dump USB traffics
 .br
-20 full dump USB traffics
+21 full dump USB traffics
 .br
 .RE
 .TP