OK, this is definitely the weirdest gear-related issue I have ever experienced. Playing a wedding dance the other night with my WP 400 into a Hartke 410XL and all the sudden the amp just cuts out. I look down at the footswitch and see the Mute has engaged. Thinking I stepped on the switch by accident, I make sure to move away from it, and about two or three songs later it comes on again. This time I KNOW I did not touch the footswitch. So I unplug the footswitch, and the next time the Mute engages and I realize that it has coincided EXACTLY with my singer turning off the switch for our fog machine. At the break we tried it a couple more times and sure enough, each time he turned off the fog machine, on went the Mute in my amp – even when the footswitch was unplugged. What the heck? Has anything like this happened to anyone else? I bought this amp brand new, just 6 months ago. Is this something I should be taking up with SWR? I’m already regretting I didn’t save a few more shekels and buy a Shuttle 6.0 instead, and this glitch isn’t helping me feel any better about it. Thanks in advance.