Safari icon bounces but doesn't open

Almost exactly a year ago, the Safari icon on my doc stopped opening. It bounces once or twice but I can't access Safari at all. The same has happened to the Mac Mail icon and a few others that were on the dock. I recall seeing something that looked like a little expoding cloud and hearing a "bang" and the app either disappeared from the dock completely or it just bounces but won't open. It happens so quickly that sometimes I don't know what I've lost. (Nothing appears in the trash, btw.)I checked the logs and here are just the first several lines of what is a very lengthy list of things in the log.
I hope someone might be able to decipher what went wrong and how to fix it.
Host Name: gretchen-cremer-brants-Computer.local
Date/Time: 2008-06-16 13:02:45 -0500
OS Version: 10.3.9 (Build 7W98)
Report Version: 2
Command: Safari
Path: /Applications/
Version: 1.3.2 (312.6)
PID: 930
Thread: 0
Exception: EXCBADACCESS (0x0001)
Codes: KERNPROTECTIONFAILURE (0x0002) at 0x00000000
I also can't get Software Update to operate.
Please help. I feel like my ibook G4 is dying in bits and pieces.
Message was edited by: Gretchen Brant

Not really answerered since no one reponded