i believe the last commit missed the other place to bump PKGNAME:
Index: Makefile
===================================================================
RCS file: /cvs/ports/sysutils/symon/Makefile,v
retrieving revision 1.19
diff -u -r1.19 Makefile
--- Makefile 5 Jan 2006 21:45:39 -0000 1.19
+++ Makefile 10 Jan 2006 17:40:45 -0000
@@ -30,7 +30,7 @@
MUX_LIBDEPENDS= rrd:rrdtool-*:net/rrdtool
.for i in ${MULTI_PACKAGES}
-FULLPKGNAME${i}= symon${i}-${V}
+FULLPKGNAME${i}= symon${i}-${V}p0
.endfor
.if defined(PACKAGING) && !empty(SUBPACKAGE)
