Ok... I know that e-m5s make huming/fan noise all the time. BUT mine also makes this weird noise. It almost sounds like old car brake. Its pretty loud. I could hear it outside in crowed park. Also the noise sometimes last few seconds. It doesn't do it all the time but very often about 7-8 times out of 10. Does anyone else get the same noise? Should I send this back and get a replacement? Again the noise is almost like a old car brake, high pitch noise like a metal disc grinding or something. I think its got to do with the IS since it mostly happens in low light.