Re: FREQUENT Kernel panics Motion 3 in 10.4 PPC G5

That's a good question, and right now, the answer is "maybe". I've got a fully up-to-date 10.5.1 OS with FCStudio on it, FCP is 6.0.2, and at work we have a 10.4.11 with FCStudio updated on it to FCP 6.0.2 - and the 10.4.11 machine's version of Final Cut says that it "cannot read or the file is from a newer version of Final Cut Pro".

So, if you're going to do major editing, you might want to do your Motion stuff in leopard, and then reboot into Tiger and import them into your timeline then. Shouldn't be a problem. You might test, this, tho, by simply rebooting to leopard, building a quick Motion project, and then go back to Tiger to import and render/export as you're going to do with your final.

I will add, however, that my leopard machine is both faster and more stable than 10.4.11 has left the work machine, and they are basically identical G5s. You might just take the plunge if you have the time to do so.