FreeBSD-10 and processes swapping out for no reason

[Dmitry Sivachenko]

Hello!

Recently I updated several of my servers from 9.2-STABLE 10.0:
10.0-PRERELEASE FreeBSD 10.0-PRERELEASE #0 r259661

Workload did not change at all, same programs, same load, same hardware.

I noticed that some of the processes on 10.0 boxes are marked as swapped out in top(1) output:

 1436 root            1  43    0 16524K     0K nanslp 14   1:14   0.00% <cron>
 1381 smmsp           1  20    0 23988K     0K pause  18   0:04   0.00% <sendma
99348 mitya           1  21    0 23492K     0K pause  16   0:00   0.00% <csh>

ps also shows them as swapped out (W as second character in state field):
 1381  -  IWs       0:00.00 sendmail: Queue runner at 00:30:00 for /var/spool/clie
 1436  -  IWs       0:00.00 /usr/sbin/cron -s
80231  -  IWs       0:00.00 /usr/local/sbin/collectdmon -c /usr/local/sbin/coll
99348  1  IWs       0:00.00 -csh (csh)

These machines have enought RAM and that never happened on 9.2-STABLE.

I turned off swap:
# swapinfo
Device          1K-blocks     Used    Avail Capacity
#

And state of these processes did not change: still second characted in state field of ps output is W, and top shows them in angles.

How should I treat that?

Thanks.