Long & McQuade rocks... right now, they're fixing my two year old Dunlop 535QC wah for free, even though it's almost a year out of warranty. I originally thought that my Visa would double the manufacturer's warranty, but I had bought the wah used, so it didn't. But, when I explained it the the boys at L&M, they said that they'd do it for free!

So, if your local L&M is anything like the one here in T.O., I'd say bring it back, explain it to them, and they'll probably figure that the pedal was broken or breaking down before you rented it.

If it had happened to me, I seriously doubt the Long & McQuade folks would come after me for repair costs. That's one of the costs of renting out equipment; you have to figure that some of it will get broken.