Terminated abnormally

Hi,
can someone explain what the following warnings mean and I can do against?
If this is explained someweher in a FAQ, thx for pointing me into the
right direction! :)

1999/06/11 07:41:58| Detected DEAD Sibling: www-proxy.de.uu.net/3128/3130
1999/06/11 07:42:13| WARNING: All 55138 swap files are in use.
1999/06/11 07:42:13| You should probably use a lower value for
1999/06/11 07:42:13| 'store_avg_object_size' in squid.conf
1999/06/11 07:42:13| WARNING: storeOpenSwapFileRead: bad swap_file_number
1999/06/11 07:42:13| Swapfile open failed
FATAL: file_write: bad FD
Squid Cache (Version 1.NOVM.21): Terminated abnormally.

-- 
Mark Seuffert, Pirates Communication, http://www.pirate.de