diff --git a/avr/usbload/commandline/snesuploader.c b/avr/usbload/commandline/snesuploader.c
index ced4584..cbab102 100644
--- a/avr/usbload/commandline/snesuploader.c
+++ b/avr/usbload/commandline/snesuploader.c
@@ -133,6 +133,7 @@ int main(int argc, char **argv)
     uint8_t bank = 0;
     uint8_t bank_cnt = 0;
     uint32_t file_size = 0;
+    uint32_t file_offset = 0;
     
     FILE *fp;
     usb_init();
@@ -171,10 +172,11 @@ int main(int argc, char **argv)
         
         fseek (fp, 0, SEEK_END);
         file_size = ftell (fp);
-
+        file_offset = 512;
         if (strstr(argv[2],".smc") || strstr(argv[2],".swc")){
             printf("Skip 512 Byte header\n");
             file_size -= 512;
+            
             fseek (fp, 512, SEEK_SET);
             
         } else { 
@@ -250,7 +252,7 @@ int main(int argc, char **argv)
                              0, 5000);
  
         
-        fseek(fp, 0, SEEK_SET);
+        fseek(fp, file_offset, SEEK_SET);
         while ((cnt = fread(read_buffer, READ_BUFFER_SIZE, 1, fp)) > 0) {
             printf ("bank=0x%02x crc=0x%04x\n", bank++, 
                 do_crc(read_buffer, READ_BUFFER_SIZE));
diff --git a/avr/usbload/main.c b/avr/usbload/main.c
index a7467da..9290d8b 100644
--- a/avr/usbload/main.c
+++ b/avr/usbload/main.c
@@ -153,12 +153,12 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
         rx_remaining = rq->wLength.word;
 #if 0
         if (req_addr && (req_addr % 0x1000) == 0) {
-            debug(DEBUG_USB,"USB_UPLOAD_ADDR: bank=0x%02x addr=0x%08lx crc=%04x\n",
+            debug(DEBUG_USB,"USB_BULK_UPLOAD_NEXT: bank=0x%02x addr=0x%08lx crc=%04x\n",
                 req_bank, req_addr,crc_check_bulk_memory(req_addr - 0x1000,req_addr));
         
         }
-#endif
         sram_bulk_write_start(req_addr);
+#endif
         if (req_addr && req_addr % req_bank_size == 0) {
             debug(DEBUG_USB,"USB_BULK_UPLOAD_NEXT: req_bank=0x%02x addr= 0x%08lx time=%.4f\n",
                    req_bank, req_addr,timer_stop());
diff --git a/avr/usbload/timer.c b/avr/usbload/timer.c
index 41a12ef..9fd13bf 100644
--- a/avr/usbload/timer.c
+++ b/avr/usbload/timer.c
@@ -17,7 +17,7 @@
 //#define XTAL      11059201L   // nominal value
 #define XTAL        20000000UL 
 
-#define DEBOUNCE    256L        // debounce clock (256Hz = 4msec)
+#define DEBOUNCE    500L        // debounce clock (256Hz = 4msec)
  
 #define uint8_t unsigned char
 #define uint unsigned int