Working at Apple, I don't know one customer who wants to go back to Tiger. Keep in mind, people don't go online to post compliments, they typically make complaints. That fact alone isn't representative of the overall reaction to any particular product (in this case Leopard). Most of the customers (actually, in my case all of my customers) LOVE Leopard over Tiger, especially the PPC users who have noticed a double in speed increase.
Leopard installed fine on my Mac Pro. No complaints here. Vista on my slave drive, well, that's another story.
Well then, let me be the first to tell you that I have returned to Tiger for MANY reasons.
Let me list a bit of my troubles for the casual viewer:
Here's my setup: PPC G5 Dual 2.3 ghz, 4.5 GB of RAM, 2 internal drives = 500gb, 1 external @ 500gb. All the RAM is from crucial and Apple - I've had it the RAM for over a year... so the freezes aren't related to old/bad RAM.
1 internal has Tiger the other Leopard (clean install). The external is for Time machine.
1. Several crashes (per session) of Safari
2. HUGE memory hog (here's the running programs: Finder, Safari, Firfox, ichat, itunes, iphoto, Dragthing, Entourage, ical.
a. Tiger - I would average 400-600 mb
b. Leopard - I run around 1800 mb
3. I've had a total system freeze (using MacPilot) whereby I had to hard restart.
4. While using spaces, I switch to a space where an app resides, only to not be able to bring up my last active window (not a frequent occurence -random.
5. I've had to restart a few times and when I did, I got a blue screen telling me to restart again!
6. Having my iphone plugged in when I start the computer - it takes 4-5 minutes before I am fully at desktop. (tiger is about 1 minute -these are general estimates)
7. Every time i restart in Leopard (not in Tiger), I lose my internet connection and have to restart my linksys wireless router (I'm wired in, my girlfriend is wireless)
8. Noticed not one "bit/byte" of speed increase so purported by the masses.
9. Horrible bandwidth hog in ichat video (yeah, I actually use it)
With that all said - I (personally) feel this is a SUPER DUPER STINKER!!! AND - I could be easily classified as a fanboi - check my sig and I've been on mac since day one of OS 9.1 with by beloved beige DT (gossamer) 266 mhz.
I was very excited by so much of this - spaces, time machine, new finder etc, etc. I tried to boot in tonight just to try again... I could never get on the web (after several router restarts) but Leopard just too beta for me.
I'll wait for the 260 mb 10.5.1 update before I venture deeper.
I know others who are backin' up a bit bacause of their issues as well. Apple better sort this crap out, or it is going to become fodder for the Vista vs. Leopard wars.