fuel and wheel Q's 4kq

[nwlove <dloves@myhome.net>]

Two questions about my 4kcsq.
First of all I've noticed fuel around the differential pressure
regulator and was wondering if there is a common source and cure for
this. I can't seem to isolate the exact location of the leak (seems to
be right by the two screws but they are tight).

Second-when you look at the center area of the alloy wheel you you find
the wheel size and directly opposite there is a serial number and some
type of symbol. Can anyone tell me what the symbol is?

TIA
Tom