Too many timeouts EDNS

[Sebastian Tymków]

Hello,
I've got problem with bind 9.5.0 P2 on FreeBSD 7.0 amd64 . Since upgrade
I've received in logs something like this:

Oct 14 18:45:55 ns3 named[82577]: 14-Oct-2008 18:45:55.666 edns-disabled:
info: too many timeouts resolving 'ns1.joi.pl/A' (in 'joi.pl'?): disabling
EDNS
Oct 14 18:45:55 ns3 named[82577]: 14-Oct-2008 18:45:55.668 edns-disabled:
info: too many timeouts resolving 'ns2.joi.pl/A' (in 'joi.pl'?): disabling
EDNS
Oct 14 18:45:55 ns3 named[82577]: 14-Oct-2008 18:45:55.843 edns-disabled:
info: too many timeouts resolving 'poqclkwytd7.org/A' (in 'poqclkwytd7.org'?):
disabling EDNS

I think that messages like this kill my machine because I receive about
thousands requests per second.
Is there any possibility to disable edns ( I don't think about setting up
log to null ;)) ?  Or maybe I can tune my bind to work properly with this
requests ?
I read that answers like this may cause wrong configuration on firewall or
nat but I tried this without any firewall and got the same.
I have also another machine with linux on board which works better and got
similar load.

Best regards,

Shamrock