Didn't know about synthetic oil being bad for seating the rings, living & learning. I use Motul 5100, semi-synthetic, but since that went in only after the first hours running the engine, much of the seating would already have occurred, or at least that is what i'd like to think. Anyway, the oil and filter both looked so bad after 100 km I decided to change again at 200 to see what would come out, and this time around it may have been unnecessary, but still i'm glad that first oil wasn't in the engine for very long. It's a small expense compared to what a new bike costs, and it doesn't hurt to be on the safe side. It's also interesting to notice that even so the 500 km filter looks slightly better than the 200 km one. And yes, surely oil filters are designed to last a long time, but that's under normal operating conditions.

Interestingly, these frequent oil/filter changes for new engines are recommended elsewhere, as here for example:

http://www.sacoriver.net/~red/breakin.html