found this today is it a problem ?

 

dont look it,just looks slightly damp with a very light film of oil & genral road dirt is it leaving any drips on the floor?

 

You'll might well find it was as a result of the last time it was changed. Is there any signs of a leak? It the drain nut tight? Have you checked the levels (on a flat surface it should fill to the bottom of the fill nut directly above)

Have you tried cleaning it up and seeing if it comes back? Oil has a habit of collecting road grime and looking worse than it is.

I had something similar when I cracked the case (through meddling as usual) and it seemed to leech up from where the seal was broken on the gasket.

 

Im going to clean it up tomorrow and see if it comes back then - cheers