Re: Upgrade to Leopard...
Kia Ora Guys,
thought another country might help bridge the time zones!
Just to clarify, have you returned your components folder to it's original place? What might be going on is that Logic is being a bit tantrumy with some of your 3rd party plugs. Rounik's right about upgrading Tiger to Leopard rather than fresh installs. It's not the most reliable way of doing it... and Waves are well known for their license quirkiness.... as much as their price!
When you're booting up Logic in 'Safe' mode, it won't have access to an audio engine so won't be able to power the plugins and instruments hence appearing with a red line through them.
Start with hardware first. Get the soundcard working in other things like iTunes, Quicktime videos.. make sure the Operating system is happy with your sound card.... as well as your Quicktime. Amazing what effect that thing has! Nice card too by the way.
Then turn to the plug ins. Make sure you have the latest version of them all... and have your serial numbers handy.... and a comfy seat.... and an internet connection. You might have to register everything again.
Once all of that is double checked, try things like GarageBand and Mainstage... make sure you can't get them to fall over then you know it must be a logic thing. That's when we can look at moving your 3rd party plugs and see how logic goes then... one by one :)
Keep us posted.