Fixing PWM on pins 9 & 10 on the Uno.

Resetting TCCR1B to 0 after it's configured by optiboot.

http://code.google.com/p/arduino/issues/detail?id=364

hardware/arduino/cores/arduino/wiring.c

@@ -190,6 +190,8 @@ void init()
 	// note, however, that fast pwm mode can achieve a frequency of up
 	// 8 MHz (with a 16 MHz clock) at 50% duty cycle
         
+        TCCR1B = 0;
+
 	// set timer 1 prescale factor to 64
 	sbi(TCCR1B, CS11);
 	sbi(TCCR1B, CS10);