My 3910 DVD player usually runs very quietly - a faint hum you can hear from the listening position during quite bits in the film, but nothing other than that. However, on some discs, you get an audible clicking that fades in and out as the disc spins, and tends to be worst at the start of the film (when the disc is spinning fastest) and fades away completely as the film plays. If it's doing this, it is sometimes possible to improve matters it by ejecting the disc and reloading it, suggesting it may be due to the disc not being perfectly aligned when it's first loaded. Note I'm referring to mechanical noise from the transport - not anything in the video or audio outputs. Has anyone else noticed occasional mechanical noise from the drive of their 3910 - mine seems perfect in every other respect, so I'm more curious than worried!