A. It appears to be condensation. Sometimes it fixes itself with a long hot ride. Other times you will need to change the oil WHILE IT IS VERY HOT, or you can add SEAFOAM to the crankcase oil. You can buy SEAFOAM at any autoparts store. It's really awesome and I've used it for years in many different applications.
B. As you stated, you changed to SYN oil. Occasionally, I have seen strange reactions between mineral based oils and SYN when they are mixed. However, it's very rare, and usually only happens with high-mileage bikes. I'm guessing your issue is condensation. Best of luck!
'I use my cigar smoke as idiot repellent'
Yeah, that’s a statistic sample size of 1, category “anecdotal evidence”, but there it is.
"You just got killed by a Daewoo Lanos motherfu#&er!!" -Red, from Pineapple Express.