Unfortunately not in a good way! My 2 month old Wharfedale DVD 750s has developed a rather annoying habit. It makes a sh-sh-sh-sh-sh-sh-sh-sh noise when it gets warmed up. It's silent if it is playing from a cold start, but an hour into the Matrix it started making this damned annoying noise. I tried isolating any outside causes, vibrations, interference etc. to no avail. Have any other 750 owners experienced this problem? I'm hoping it doesn't have to go back to Richer sounds again, again, again (sooo many problems), but it gets really tedious during quiet scenes.