diff --git a/ports/unix/netif/tapif.c b/ports/unix/netif/tapif.c
index dfe3b53..ffd048c 100644
--- a/ports/unix/netif/tapif.c
+++ b/ports/unix/netif/tapif.c
@@ -312,13 +312,6 @@ tapif_input(struct netif *netif)
   }
 }
 /*-----------------------------------------------------------------------------------*/
-static void
-arp_timer(void *arg)
-{
-  etharp_tmr();
-  sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler)arp_timer, NULL);
-}
-/*-----------------------------------------------------------------------------------*/
 /*
  * tapif_init():
  *
@@ -347,9 +340,7 @@ tapif_init(struct netif *netif)
   
   tapif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
   low_level_init(netif);
-  etharp_init();
   
-  sys_timeout(ARP_TMR_INTERVAL, (sys_timeout_handler)arp_timer, NULL);
   return ERR_OK;
 }
 /*-----------------------------------------------------------------------------------*/
diff --git a/ports/unix/netif/tcpdump.c b/ports/unix/netif/tcpdump.c
index 2b27f4e..9a2bec1 100644
--- a/ports/unix/netif/tcpdump.c
+++ b/ports/unix/netif/tcpdump.c
@@ -58,7 +58,9 @@ tcpdump(struct pbuf *p)
 {
   struct ip_hdr *iphdr;
   struct tcp_hdr *tcphdr;
+#if LWIP_UDP
   struct udp_hdr *udphdr;
+#endif
   char flags[5];
   int i;
   int len;
@@ -139,6 +141,7 @@ tcpdump(struct pbuf *p)
     pbuf_header(p, IP_HLEN);
     break;
     
+#if LWIP_UDP
   case IP_PROTO_UDP:    
     udphdr = (struct udp_hdr *)((char *)iphdr + IP_HLEN);
     
@@ -174,6 +177,7 @@ tcpdump(struct pbuf *p)
     
     pbuf_header(p, IP_HLEN);
     break;
+#endif /* LWIP_UDP */
 
   }
 #endif /* IPv4 */
diff --git a/ports/unix/proj/unixsim/apps/shell.c b/ports/unix/proj/unixsim/apps/shell.c
index 8dad785..869d232 100644
--- a/ports/unix/proj/unixsim/apps/shell.c
+++ b/ports/unix/proj/unixsim/apps/shell.c
@@ -80,7 +80,7 @@ clos [connection #]: closes a TCP or UDP connection.\n\
 stat: prints out lwIP statistics.\n\
 quit: quits.\n";
 
-#define STAT_NUM ((6 * 13) + (6) + (4) + (11 * 4) + (2 * 3))
+#define STAT_NUM (((5 + LWIP_UDP) * 13) + (4) + (11 * 4) + (2 * 3))
 
 static char *stat_msgs[STAT_NUM] = {
   "Link level * transmitted ",
@@ -135,6 +135,7 @@ static char *stat_msgs[STAT_NUM] = {
   "             option errors ",
   "           * misc errors ",
   "             cache hits ",  
+#if LWIP_UDP
   "UDP        * transmitted ",
   "             retransmitted ",
   "           * received ",
@@ -148,6 +149,7 @@ static char *stat_msgs[STAT_NUM] = {
   "             option errors ",
   "           * misc errors ",
   "             cache hits ",  
+#endif
   "TCP        * transmitted ",
   "           * retransmitted ",
   "           * received ",
@@ -161,12 +163,6 @@ static char *stat_msgs[STAT_NUM] = {
   "           * option errors ",
   "           * misc errors ",
   "           * cache hits ",  
-  "Pbufs      * available ",
-  "           * used ",
-  "           * high water mark ",
-  "           * errors ",
-  "             pbuf_alloc() locked ",
-  "             pbuf_refresh() locked ",
   "Memory     * available ",
   "           * used ",
   "           * high water mark ",
@@ -280,6 +276,7 @@ static char *stat_formats[STAT_NUM] = {
   U16_F, /* icmp err */
   U16_F, /* icmp cachehit */
 
+#if LWIP_UDP
   U16_F, /* udp xmit */
   U16_F, /* udp rexmit */
   U16_F, /* udp recv */
@@ -293,6 +290,7 @@ static char *stat_formats[STAT_NUM] = {
   U16_F, /* udp opterr */
   U16_F, /* udp err */
   U16_F, /* udp cachehit */  
+#endif
 
   U16_F, /* tcp xmit */
   U16_F, /* tcp exmit */
@@ -308,14 +306,6 @@ static char *stat_formats[STAT_NUM] = {
   U16_F, /* tcp err */
   U16_F, /* tcp cachehit */
 
-  /* FIXME: pbuf stats have moved to memp stats */
-  U16_F, /* pbuf avail */
-  U16_F, /* pbuf used */
-  U16_F, /* pbuf max */
-  U16_F, /* pbuf err */
-  U16_F, /* pbuf alloc_locked */
-  U16_F, /* pbuf refresh_locked */
-
   /* FIXME: always using 11 memp pools is wrong! */
   U32_F, /* mem avail */
   U32_F, /* mem used */
@@ -443,6 +433,7 @@ static void *stat_ptrs[STAT_NUM] = {
   &lwip_stats.icmp.err,
   &lwip_stats.icmp.cachehit,
 
+#if LWIP_UDP
   &lwip_stats.udp.xmit,
   &lwip_stats.udp.rexmit,
   &lwip_stats.udp.recv,
@@ -456,6 +447,7 @@ static void *stat_ptrs[STAT_NUM] = {
   &lwip_stats.udp.opterr,
   &lwip_stats.udp.err,
   &lwip_stats.udp.cachehit,
+#endif
 
   &lwip_stats.tcp.xmit,
   &lwip_stats.tcp.rexmit,
@@ -471,15 +463,6 @@ static void *stat_ptrs[STAT_NUM] = {
   &lwip_stats.tcp.err,
   &lwip_stats.tcp.cachehit,
 
-  /* FIXME: pbuf stats have moved to memp stats */
-  NULL, NULL, NULL, NULL, NULL, NULL,
-  /*&lwip_stats.pbuf.avail,
-  &lwip_stats.pbuf.used,
-  &lwip_stats.pbuf.max,
-  &lwip_stats.pbuf.err,
-  &lwip_stats.pbuf.alloc_locked,
-  &lwip_stats.pbuf.refresh_locked,*/
-
   &lwip_stats.mem.avail,
   &lwip_stats.mem.used,
   &lwip_stats.mem.max,