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nothing to worry about

Same with my S70R mate, its just condensation mixing with the oil, it makes checking the oil level a bit tricky because of the crap thats on it.
Happens a lot in winter when you just do short...

Is the car used for short trips? If so, this is probably why you have this On the dipstick as the oil cools in the dipstick tube and doesn't warm up fully.

I bet if you took it for a decent run...