Has anyone had a leak at the rear of the oil sump cover?

[machone]

I've been puttering through spring maintenance on my 1999 2.5L for the last few weeks, and just noticed what appears to be an oil leak at the rear of the oil sump cover gasket. After a pretty thorough cleaning, I've convinced myself that its not coming from the oil drain, and I don't see where else it could have originated from.

Has anyone had a problem with a leak in this gasket? Wanted to see if anyone had a 'Yeah, I thought it was that and then..." story.

Also, I don't see this referenced in Bentley other than that the cover exists in the oil section. Is this one of those unique situations where these bolts hold the cases together or something equally traumatic?

-Thanks.