I noticed this last night and cleaned off some of the dust/dirt buildup to check progress when I do the front brakes and will have the car up higher and on jack stands.

From the somewhat crappy pix and what I could see with limited view last night, it looks heaviest between that bracket off the oil pan and that boot. Things got cleaner nearer to the gearbox itself and where the rubber runs up towards the radiator.

Anyone else have this happen? Like I said when I do the brakes I will get a better view and try to clean that mess up.

 

Might be able to replace those clamps. Toyotas have the same issue with the power steering return lines. Replacing the clamps fixed it.

 

It happens, I had a Mazda that had a fitting replaced. My BMW at 200k had it happen. Anytime you have more lines, you have more chances for leaks.