Hi everyone I wonder if anyone can help. I bought an MZ RH-10 Hi-MD unit back in June 2005 from Amazon. But over the past 6 months it's developed some very annoying problems. 1) If I jolt the unit heavily, like running up stairs, the unit just cuts out completely. Sound stops and it turns off, even if the battery has plenty of energy left. Then turning it back on takes it back to the point the disc was at when I turned it on previously - not at the point when it turned off. 2) Copying music