Same here....
Jag install on G4 500 Dual. Archive and Install (keep Home etc). Seemed to be fine. But MS Entourage (email) kept asking for passwords. Then .Mac preference pane would forget the passwords too. And clicking any Authenticating locks in Preferences wasnt working. It worked a few times then stopped.
Turns out the keychain had locked itself randomly. Open Keychain app and click unlock no go. Useless. Log out OS X drops out to the Console very scary.
Force restart or Sudo reboot.
Everything fine. Until I go online and use email....
So I reinstalled with Archive again. Still same. Then replaced my Keychain (backed it up, then deleted it and tried that). Same problems.
So I made a new Admin user. Moved all my files over took ages to sort out all the permission problems that come from that had to burn CDs of most of it then copy them back to the new user. Deleted the old user.
This means a fresh Admin user for me....
Keychain hadnt gone wrong for a whole day....
Then it started playing up again.
I reinstalled Office X. And thats where Im up to now.
Overall Jaguar is ace. But weird problems have been occurring randomly. Adobe InDesign stopped having Undos. No reason. A restart fixed it. I cant find anything wrong with the system.
The keychain problem hasnt occurred today and Ive been trying to make it happen. So.... I can only hope Ive fixed it.
In 10.1.5 I had no problems at all. Everything just worked all day long. Whatever I could try to do it would never go wrong nothing ever (except Sleep which works in Jaguar!!). Jaguar so far isnt as reliable. Except Jaguar is MUCH faster I love the speed. InDesign is noticeably faster, as is Photoshop and the Finder...
Seems Im not alone with jaguar problems. I also have all my apps set up how I like them and dont want to erase my drive. Its very very clean at the moment Ive backed up everything and defragged so erasing wouldnt take too long (5 hours ish??) but since others who have put in the time still have problems I might just wait until 10.2.1. I suggest everyone do the following and watch out for problems if the little Keychain lock icon locks itself.....
Go to: Applications > Utilities > Keychain Access
Then go to View Menu and select > Show Status in Menu Bar.
I hope these problems go away! Restarting every now and then isnt too bad it only takes 30 seconds now so its ok. But weve got so used to no problems with 10.1.5 that its unacceptable!!!
See this thread... more info:
http://www.macosx.com/forums/showthread.php?s=&postid=149315#post149315