1. Changing tabs in Safari. Cmd+Shift+Left and Cmd+Shift+Right aren't as useful as they once were in Safari. Now the focus always seems to be in the wrong place and they don't change your tab position. They used to work regardless of focus. Now you need to learn the new alternative.. Cmd+Shift+[ and Cmd+Shift+] Easily enough to learn I guess!

2. Position of stuff keeps changing during search. This was a problem in Safari, and a problem which is hard to work around, either as a user or as an Apple developer. When you do a Spotlight search, it can take up to 15 seconds to finish. But you may see what you want to click on during this time. You reach to click it, and bam.. your desired item has now moved elsewhere and you just loaded some 100MB PDF which is going to take forever to display.

3. The new Safari error messages suck. I hated it when Internet Explorer started "cute" error messages, and I hate it when Safari does too. I want to see the 404, 403, or whatever. Not the cutesy message.

4. Safari always puts RSS feeds into 'feed' view. I'm a developer, sometimes I want to see the raw source, not the feed in feed view. View Source does still work, but it shows you the source for Apple's feed layout, not the actual feed. I guess this is another thing I can use FireFox for.

5. Generally slower. Tiger seems generally slower than Panther. Spotlight is miserably slow on the Mac Mini.

6. Still memory leaks. Safari still balloons up to taking up to 120MB of memory after prolonged use. It's using 68MB on here right now. mds, part of Spotlight, sometimes decides to take up to 65MB of memory. This happened twice yesterday, and I kill -HUP mds'ed it, and it went back down to its usual 6MB (where it's sitting right now). The kernel also seems to use more memory than ever before, usually around 64MB.

7. Dashboard is slow. If you keep using it, it's fine. If you don't use it for an hour, you hit F12, your screen goes dim, the hard drive chunters for five seconds, then Dashboard appears as a flash. The world clocks I have set up take a couple of seconds to update, or sometimes need me to flip them over and hit Done on them to get them to work!

8. It messed up my Perl. Tiger made the leap from 5.8.1 to 5.8.6, but failed to provide everything necessary. Now module builds are failing, and I need to work out how to fix it..

I'm sure I'll get used to its quirks and features soon enough, but it's not a solid performance from Tiger from me. Perhaps it needs to be installed fresh, rather than upgraded.