Cubase studio 4 and OSX updating

I have a cubase studio 4.5.2 and mac osx 10.4.11 software.
Now I’m updating my software to 10.5 or 10.6.
I have read that there might be some problems between studio 4 and osx 10.5 or higher versions.
Is that true or has those problems solved?

What Mac are you using (Intel or still on PPC)?

I have a Macbook 2,1 intel core duo.

I can still run Cubase 4.5.2 here on my Mac Pro (OS X 10.6.8). Eventual problems may come from some older 3rd-party plugins though.

Ok, thanks vic_france!