Tiny metal bits in oil filter - any cause for concern?

[elgyqc]

That's not a lot, the piece that looks like a blob of solder is strange. The brown plastic is likely from the cam chain tensioner pads in the heads, keep an eye on that, they are usually well worn at 100k miles and are ready for replacement. Check or have checked the cam deviations, which gives some idea of the wear on the pads.
You might try reducing the size of your pictures... I usual make mine 1000x750 pixels.