No more cache hits

[Dayo Adewunmi <contactdayo@xxxxxxxxx>]

Hi

For about 3 hours now, I haven't had much in the way of cache hits, and 
the cache misses have gone through the roof. I don't have any idea 
what's happening here with this.
Here are my specs:

Squid: Version:     2.6.18-1ubuntu3
OS: Ubuntu     8.04
squidclient mgr:utilization:     http://pastebin.com/fJFV5dD0
Munin graph:    http://i.imgur.com/b2hDu.png

Thanks

Dayo