Help! This is driving me mad. The speaker is making very loud static crackling sounds when everything is muted but it seems to be linked to flash player running. I have googled but foudn lots of people with the same problem but no solutions!
Glad it has stopped... if it is any consolation I've noticed that there can be odd noises from my Gateway laptop, but only if using the headphone socket.
I will have to consider whether it was because of Flash (since BBC iPlayer runs using Flash, it might be affecting the audio circuits, or just a coincidence that I have only recently noticed this as a problem).