Could still be other fluid type than diesel. First step is to determine what type of fluid it is, then chase the culprit. IIWMIwouldn't tighten lift pump bolts unless i confirm that diesel is leaking. Don't want to start a leak where one doesn't exist yet, especially in the diesel delivery loop. If its hydraulic oil dripping, or coolant, those leaks are simple to correct. I've seen dirty coolant that looked like diesel but doesn't smell like it.
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project