Not likely. There was one time when the oil was seeping around the seal ends through a miniscule gap in the gasket material, but the joint itself generally remains dry, and oil was leaking through the seal too. The oil collects on the bottom of the joint on the transmission spacer (we call it the waffle plate). The oil mainly collects in the half circle and then drips down from there.
And we've swapped upper oil pans, just in case that was the issue. The original had a groove worn from wrong sized flywheel bolts being used, we thought that the thinned aluminum might be flexing with heat/stress and leaking. We were wrong.

I'll try to get some pics next time we pull it. We just got back from a test weekend of autoX and the tell tale drip is present. We can get about 20 hours of racing on it before the clutch starts to slip horribly, so we're leaving it in for now. We have a race in 2 weeks and then will tear it apart again.

__________________
'06 MINI GP - wants to be a race car
'05 F350 - hauls race car
'82 300SD - actual race car
Dirty Little Freaks Racing ~ racing diesel before diesel was cool