I made the simplest circuit with a 9V battery, a green LED (3.3v and 20ma) and a 550 ohms resistor (green green brown gold)
The LED was brand new and died immediately and the resistor was burning hot.
The same circuit with a red LED worked fine.
Does it matter where the resistor is in the circuit (in this case I put it at the end, between the LED and the - of the battery as I read it doesn't matter)
Does it matter which end of the resistor you connect to the battery? (does it have a + and -?)
According to http://www.hebeiltd.com.cn/?p=zz.led.resistor.calculator a 330 ohm resistor would have been enough for a 3.3v LED in a simple circuit.