[horde] Memcache delete weirdness

[Kevin Konowalec]

Running horde 3.2.1
PHP 5.2.3
memcached 1.1.12


We're seeing some weirdness in the horde logs that I've never seen  
before:


Dec  3 14:57:29 src at webcluster6 HORDE[10564]: PHP Notice:   
Memcache::delete() [<a href='function.Memcache- 
delete'>function.Memcache-delete</a>]: Server xxx.xxx.xxx.xxx (tcp  
11211) failed with: Failed writing command to stream (0) in /var/www/ 
horde/lib/Horde/Memcache.php on line 150
Dec  3 14:58:40 src at webcluster6 HORDE[1224]: PHP Notice:   
Memcache::delete() [<a href='function.Memcache- 
delete'>function.Memcache-delete</a>]: Server xxx.xxx.xxx.xxx (tcp  
11211) failed with: Failed reading line from stream (0) in /var/www/ 
horde/lib/Horde/Memcache.php on line 144


Has anyone else seen this, know what this means, and/or know what to  
do about it?

Thanks

K