diff --git a/ChangeLog b/ChangeLog
index 4571c8e0a..8edd07645 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2004-04-15  Marian Eichholz <eichholz@computer.org>
+
+	* backend/sm3600.h backend/sm3600-scanmtek.c
+	  backend/sm3600-color.c backend/sm3600-gray.c
+	  backend/sm3600-homerun.c: Many fixes for MacOS-X problems pointed
+	  out by Mattias Ellert, thanks: Waiting longer for DoJog() command
+	  completion, new function for transmitting the line gain correction
+	  data with correct endianess, Chassis-Gray-Level lowered.
+
 2004-04-14  Karl Heinz Kremer <khk@khk.net>
 
 	* backend/epson.conf: Added "usb" entry for libusb
diff --git a/backend/sm3600-color.c b/backend/sm3600-color.c
index b128d39d1..9b4a17f13 100644
--- a/backend/sm3600-color.c
+++ b/backend/sm3600-color.c
@@ -271,23 +271,8 @@ TState StartScanColor(TInstance *this)
   UploadGammaTable(this,0x4000,this->agammaB);
   INST_ASSERT();
 
-#ifndef SM3600_NO_GAIN_CORRECTION
-  RegWrite(this,0x3D,1,0x0F | 0x80); /* 10XXXXXX : one offset table */
-  RegWrite(this,0x3F,1,0x18); /* 16KB gain at 0x06000 */
-  {
-    unsigned short uwGain[8192];
-    int i,iOff;
-
-    /*
-      Oopsi: correction data starts at the left of the scanning window!
-    */
-    iOff=this->param.x/2+this->calibration.xMargin;
-    for (i=iOff; i<MAX_PIXEL_PER_SCANLINE; i++)
-      uwGain[i-iOff]=this->calibration.achStripeY[i]<<4;
-    for (i=0; i<0x4000; i+=0x1000)
-      MemWriteArray(this,(0x6000+i)>>1,0x1000,(unsigned char*)&uwGain[i>>1]);
-  }
-#endif
+  UploadGainCorrection(this);
+  INST_ASSERT();
 
   /* enough for 1/100 inch sensor distance */
   this->state.cBacklog=1+2*this->state.ySensorSkew;
diff --git a/backend/sm3600-gray.c b/backend/sm3600-gray.c
index 223384584..195258b9b 100644
--- a/backend/sm3600-gray.c
+++ b/backend/sm3600-gray.c
@@ -346,23 +346,8 @@ TState StartScanGray(TInstance *this)
   RegWrite(this,0x40,1,0x20); /* FIFO at   0x08000 */
   UploadGammaTable(this,0,this->agammaY); INST_ASSERT();
 
-#ifndef SM3600_NO_GAIN_CORRECTION
-  RegWrite(this,0x3D,1,0x0F | 0x80); /* 10XXXXXX : one offset table */
-  RegWrite(this,0x3F,1,0x08); /* 16KB gain at 0x02000 */
-  {
-    unsigned short uwGain[8192];
-    int i,iOff;
-
-    /*
-      Oopsi: correction data starts at the left of the scanning window!
-    */
-    iOff=this->param.x/2+this->calibration.xMargin;
-    for (i=iOff; i<MAX_PIXEL_PER_SCANLINE; i++)
-      uwGain[i-iOff]=this->calibration.achStripeY[i]<<4;
-    for (i=0; i<0x4000; i+=0x1000)
-      MemWriteArray(this,(0x2000+i)>>1,0x1000,(unsigned char*)&uwGain[i>>1]);
-  }
-#endif
+  UploadGainCorrection(this);
+  INST_ASSERT();
 
   /* for halftone dithering we need one history line */
   this->state.pchBuf=malloc(USB_CHUNK_SIZE);
diff --git a/backend/sm3600-homerun.c b/backend/sm3600-homerun.c
index 321238791..fe647efe6 100644
--- a/backend/sm3600-homerun.c
+++ b/backend/sm3600-homerun.c
@@ -56,9 +56,11 @@ slider movement
 /* tuning constants for DoOriginate */
 #define CCH_BONSAI              60
 #define BLACK_HOLE_GRAY         30
-#define CHASSIS_GRAY_LEVEL      100
 #define BLACK_BED_LEVEL         10
 
+/* changed by user request from 100, there are probably darker stripes */
+#define CHASSIS_GRAY_LEVEL      75
+
 typedef enum { ltHome, ltUnknown, ltBed, ltError } TLineType;
 
 #define INST_ASSERT2() { if (this->nErrorState) return ltError; }
@@ -492,6 +494,6 @@ TState DoJog(TInstance *this, int nDistance)
     }
   INST_ASSERT();
   usleep(100);
-  return WaitWhileBusy(this,100);
+  return WaitWhileBusy(this,1000); /* thanks Mattias Ellert */
 }
 
diff --git a/backend/sm3600-scanmtek.c b/backend/sm3600-scanmtek.c
index e0fd316b7..5297efabc 100644
--- a/backend/sm3600-scanmtek.c
+++ b/backend/sm3600-scanmtek.c
@@ -272,3 +272,41 @@ TState UploadGammaTable(TInstance *this, int iByteAddress, SANE_Int *pnGamma)
   free(puchGamma);
   return rc;
 }
+
+/* **********************************************************************
+
+UploadGainCorrection()
+
+********************************************************************** */
+
+__SM3600EXPORT__
+TState UploadGainCorrection(TInstance *this)
+{
+#ifndef SM3600_NO_GAIN_CORRECTION
+  RegWrite(this,0x3D,1,0x0F | 0x80); /* 10XXXXXX : one offset table */
+  RegWrite(this,0x3F,1,0x18); /* 16KB gain at 0x06000 */
+  {
+    struct TGain {
+      unsigned char uchLow;
+      unsigned char uchHigh;
+    } aGain[8192];
+    int i,iOff;
+    unsigned short uwGain;
+
+    /*
+      Oopsi: correction data starts at the left of the scanning window!
+    */
+    iOff=this->param.x/2+this->calibration.xMargin;
+    memset(aGain,0,sizeof(aGain));
+    for (i=iOff; i<MAX_PIXEL_PER_SCANLINE; i++)
+      {
+	uwGain=this->calibration.achStripeY[i]<<4;
+	aGain[i-iOff].uchLow =(unsigned char)(uwGain&0xFF);
+	aGain[i-iOff].uchHigh=(unsigned char)(uwGain>>8);
+      }
+    for (i=0; i<0x2000; i+=0x1000)
+      MemWriteArray(this,(0x6000+i)>>1,0x1000,(unsigned char*)(aGain+i));
+  }
+#endif
+  return SANE_STATUS_GOOD;
+}
diff --git a/backend/sm3600.c b/backend/sm3600.c
index e8c9de7dc..70cbb3910 100644
--- a/backend/sm3600.c
+++ b/backend/sm3600.c
@@ -683,7 +683,7 @@ sane_get_parameters (SANE_Handle handle, SANE_Parameters *p)
   GetAreaSize(this);
   p->pixels_per_line=this->state.cxPixel;
   /* TODO: we need a more stable cyPixel prediction */
-  p->lines=this->state.cyPixel+1;
+  p->lines=this->state.cyPixel;
   p->last_frame=SANE_TRUE;
   switch (this->mode)
     {
diff --git a/backend/sm3600.h b/backend/sm3600.h
index 0dd8a6a38..1dec46805 100644
--- a/backend/sm3600.h
+++ b/backend/sm3600.h
@@ -283,6 +283,7 @@ __SM3600EXPORT__ TState DoLampSwitch(TInstance *this,int nPattern);
 #endif
 __SM3600EXPORT__ TState DoCalibration(TInstance *this);
 __SM3600EXPORT__ TState UploadGammaTable(TInstance *this, int iByteAddress, SANE_Int *pnGamma);
+__SM3600EXPORT__ TState UploadGainCorrection(TInstance *this);
 
 /* sm3600-scanusb.c */
 __SM3600EXPORT__ TState RegWrite(TInstance *this,int iRegister, int cb, unsigned long ulValue);