I swapped out my promini intake for a jcw unit last night, and noticed a dried black fluid that was running out of the rubber transmission mount. I wasn't aware that those were fluid filled and i've had a lot of trouble finding any more information about them.

I've already got a new oem mount along with powerflex bushings on order, so i'm not too worried about it, i'm just more curious as to if it's a common problem.

103k miles on the car. Have had the tsw upper and bsh lower mounts on for about 5k miles.

not my picture, but this is what it looks like.
http://www.motoring alliance.com/gallery/data/500/medium/P1010417.JPG