Pfsense 2.0.1-RELEASE (i386)

I get a lot of entries in the log saying: dhcpd: send_packet: No buffer space available

There are aprox 40 active users and they complain about prolonged times for getting an IP and periodically about problems accessing the internet, prolonged response times etc.

In the log there is this entry repeatedly (periodically):

Jun 10 18:27:30     dhcpd: send_packet: No buffer space available
Jun 10 18:40:53     dhcpd: send_packet: No buffer space available
Jun 10 19:01:15     dhcpd: send_packet: No buffer space available
Jun 10 19:10:47     dhcpd: send_packet: No buffer space available
Jun 10 19:31:10     dhcpd: send_packet: No buffer space available
Jun 10 19:53:51     dhcpd: send_packet: No buffer space available
Jun 10 20:23:32     dhcpd: send_packet: No buffer space available
Jun 10 21:01:42     dhcpd: send_packet: No buffer space available
Jun 10 21:04:52     dhcpd: send_packet: No buffer space available
Jun 10 21:23:29     dhcpd: send_packet: No buffer space available
Jun 10 21:46:05     dhcpd: send_packet: No buffer space available
Jun 10 22:02:17     dhcpd: send_packet: No buffer space available
Jun 10 22:02:45     dhcpd: send_packet: No buffer space available
Jun 10 22:06:21     dhcpd: send_packet: No buffer space available
Jun 10 22:08:45     dhcpd: send_packet: No buffer space available
Jun 10 22:09:19     dhcpd: send_packet: No buffer space available
Jun 10 22:22:23     dhcpd: send_packet: No buffer space available

I guess it is the same periods that the users complain about reduced access to the internet.

I have seen other threads about it. But none related to pfsense.

Any ideas of what to do?