I recently upgraded to 7.1(1) on the pix 525 and have this problem that every 4-5 days or so the firewall starts dropping packets, internet access is slow or non-existant. I use the blue cisco cable to establish a serial connection to the firewall, and am either not able to ping hosts at all, or I get a 20%-40% success rate when trying to ping. Whether I ping the outside router, inside hosts, or dmz hosts, its the same result. If I reboot the system, then seems to fix the problem completely (until the next time, when it starts all over again). I am not running any logging on the server, so its not a question of the flash filling up.
Has anyone else had this problem ?