Smooth as silk, I did an Archive and Install. No problems whatsoever. I just had to download an updated Driver for my Brother Printer and that was it.
Be aware. that in the beginning of the Install, it displays a long time for the Install, but mine took about 30 minutes (another 10 minutes to verify the Install Disc for Consistency, a step you can skip)
Also, when it gets to 1 minute remaining, that minute is quite long, so be patient.
There certainly are people that have troubles. Especially those where the 1.1 caused freezing are expected to have problems with leopard.
If your iMac worked fine with 1.1 you're fine with leopard. On the other hand, my leopard works smoothly after resetting the PRAM after I installed leopard. (I had freezes in 1.1 and rolled back to 1.0 which worked fine. I had freezes immediately after the installation of leopard.)
just bought a 24in. 2.4Ghz imac to go along with my leopard and everything has been so smooth and fast, safari is incredibly fast, the entire os blew my mind, i might not even have to upgrade from 1gb RAM, haha, but i will
Got my 24" Aluminum iMac in early September, never experienced any lock-ups like I see described here. Upgraded to Leopard last night, no problems at all (just did a regular upgrade, no archive, etc.).
As someone else mentioned, at first it indicated it would take 1 hour and 37 minutes to install, but in the end it only took about 40 minutes.
I guess the only thing that seems a bit different is that my external hard drive seems to be waking up on its own for no apparent reason. I didn't install/configure Time Machine, so that's not it, but it never used to spin up unless I tried to access files on it, but last night (and this morning) it did.
Brand new 20" iMac, bought on Saturday. Popped the CD in and performed an "Upgrade" (figured the upgrade option is probably safe and well-tested on a clean installation of Tiger... it's when you already have stuff installed it gets dodgy). No problems whatsoever!
No freezing or anything in the few days I've had it. *touch wood*.
Boot Camp was a breeze too, and I've now experienced the utter sacrilege of booting Windows XP on the thing. (Seeing DOS - or at least the DOS-like portion of XP's installation - displayed on a big glossy 20" screen made me giggle). I wasn't in it for long
Oh, it still had the terrible default colour profile. Calibration is a must, so that the characteristics of the 20" LCD aren't magnified to the point where it looks faulty and unusable.
Did an Upgrade Install on my 20" and all going smoothly so far. The first boot after the upgrade took a while, long enough for me to wonder whether I had the blue screen issue, but I left it a few minutes just to see if it recovered and it did. Subsequent boots have been fine.
BTW, anyone else notice how much brighter the iSight's picture is now?
On my 2.0 ALU I got the blue screen after upgrading, so I left it overnight then did archive and install which went nicely.
Briefly my mail app went nuts and l lost all my messages, but they came back after 10 mins. My backgrounds in photobooth don't work but all else is lookin good. Just doing TIme machine for the first time...
Did an Erase and Install and everything went fine restored from backup.
Seems faster than Tiger especially Safari and finder.
Had a funny 10 mins today when I couldn't connect to some web sites, rebooted twice and it seemed to clear. Maybe just a glitch but seemed to be something not quite right with DHCP after ISP router rebooted.
I heard some reports of macbook pros having similar issues ... sounds like a code issue when renewing your IP address.
Aside from that all is well, gets better the more you use it starting to really like the added features.