In Robokill 2, Mission 5, I had the following bug occur:

I was in the room with the Red Key, with a Matter Magnet equipped. As I was battling the enemies, I activated the Matter Magnet, and several objects flew toward me, including the Red Key. However, before the Red Key hit me, I died. (I could see the key floating over the location where I had been. It happened that I had been standing on the space to activate the elevator to the lower level, and that was where the key floated.)

I worked my way back to the room, and defeated all the enemies. However, the Red Key was no longer present. I used the Matter Magnet again, thinking perhaps it was out of sight--still nothing. The Red Key vanished, and I could not complete the level.

I am running Windows Vista 64-bit, and Firefox 3.5.4 is my Browser. Thanks!