I recently did a clean install of my entire system after 10.3.9 and QT7 Pro crashed hard. I've since learned that 10.3.9 doesn't play well with 7 Pro so I'm wondering if anyone can recommend a stable setup. I like the codec of QT7 a lot, so if Tiger works well I'll upgrade but I wanted to see if anyone had anything to offer before I upgrade.
The 10.4.3 update just came out. There were a lot of fixes in this one so I'd suggest that now is a good time to buy Tiger. If you can, do another clean wipe, put Tiger on, run all the online upgrades, and then repair permissions before loading any of your own stuff back on the system. It should work great.