diff -r b18b06c17a80 -r d857032c6201 thermferm/lcd-buffer.c
--- a/thermferm/lcd-buffer.c	Tue Aug 12 21:26:26 2014 +0200
+++ b/thermferm/lcd-buffer.c	Wed Aug 13 14:10:57 2014 +0200
@@ -95,6 +95,7 @@
 	    current_offset = current_offset + Config.lcd_rows;
 	else
 	    current_offset = 0;
+	syslog(LOG_NOTICE, "lcd_buf_step(KEY_DOWN) current_lines=%d current_offset=%d", current_lines, current_offset);
 	lcd_buf_show();
     }
     if (key == KEY_UP) {
@@ -102,6 +103,7 @@
 	    current_offset = current_offset - Config.lcd_rows;
 	else
 	    current_offset = (current_lines - Config.lcd_rows);
+	syslog(LOG_NOTICE, "lcd_buf_step(KEY_UP) current_lines=%d current_offset=%d", current_lines, current_offset);
 	lcd_buf_show();
     }
 }
@@ -122,6 +124,11 @@
 	i++;
     }
 
+    if (tmp == NULL) {
+	syslog(LOG_NOTICE, "lcd_buf_show: search after last record, current_offset=%d current_lines=%d i=%d", current_offset, current_lines, i);
+	return;
+    }
+
     lcdPosition(lcdHandle, 0, r);
     lcdPuts(lcdHandle, tmp->row);