The residue is on the engine block. As you can see, it is in the area of just above the oil filter, beside / behind the power steering pump.
I have owned the 03 Liberty since new (April 03) and only have 33k miles on it. I have performed all maintenance myself. The area noted, is an accumulation of residue, since new. I have never high pressure washed the engine bay.
The fluid / oil leak(?) must be minor. I have never had to top off the engine oil between changes. I have only had to top off the auto transmission fluid, brake and power steering fluid, once each in all that time.
I suspect it may be from engine oil or power steering fluid, but would like your best guess and hints as to how to troubleshoot and repair. Thanks in advance!

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- 2003 Jeep Liberty Sport 4X4 -
245/70R16 Revos on Rubicon (Moab) wheels. 2" Revtek spacer lift front. 2.5" Daystar puck rear. Stock struts. Rancho RSX 17004 shocks. Debadged.
http://www.cardomain.com/ride/2104014