Odd DEALLOCATE statements never finish in 9.2?

I installed 9.2 on our new server and am seeing something odd that doesn't
happen in 8.4:

postgres=# select datname, pid, usename, query from pg_stat_activity where
query != '<IDLE>';
datname | pid | usename |
query
------------+-------+----------+------------------------------------------------------------------------------------
emolecules | 19249 | test | DEALLOCATE dbdpg_p18629_26
emolecules | 19250 | test | DEALLOCATE dbdpg_p18625_20
emolecules | 19251 | test | DEALLOCATE dbdpg_p18632_23
postgres | 21583 | postgres | select datname, pid, usename, query from
pg_stat_activity where query != '<IDLE>';
emolecules | 19253 | test | DEALLOCATE dbdpg_p18627_18
emolecules | 19320 | test | DEALLOCATE dbdpg_p18640_7
emolecules | 19271 | test | DEALLOCATE dbdpg_p18628_17
emolecules | 19779 | test | DEALLOCATE dbdpg_p19319_2
emolecules | 19282 | test | DEALLOCATE dbdpg_p18626_12
emolecules | 19321 | test | DEALLOCATE dbdpg_p19283_9

There are indeed nine Postgres backends running. They are connected to
nine "fastcgi" Apache processes that sit there and wait for low-overhead
requests.

What are these DEALLOCATE requests, and why do they just sit there and
never finish?

Thanks,
Craig