re0 losing connection when idle

[Warren Liddell]

Since i updated my ports/source/world on a FREEBSD 7.1-PRERELEASE AMD64 
a few days ago and had to do a reboot, all of a sudden my network 
connection is dropping out if no consistent traffic is being done, more 
then simply an IRC chats.  i've had to have a few torrents seeding to 
maintain the connection without it dropping out an my having to 
disconnect the net cable wait a lil while an re-connect.  I checked a 
few things i knew of locally an there seems to be nothing on the 
modem//router.

Any thoughts//ideas?