Mechatronic sealing sleeve replaced at 33k miles. Like OP stated, trans fluid leak noticable when the car hasn't been driven for a few days/weeks. btw, the trans fluid looks like motor oil, not the usual red atf.
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, KW/GC/M3/Meyle susp, Apex Arc 8, Mich PSS