Is It My Macbook Pro or Leopard?

I have a Macbook Pro Core 2 Duo (November 2006) that was purring like a kitten when I bought (running on Tiger). Ever since upgrading to Leopard I've had nothing but problems, but some of them have been so disconcerting I'm not sure if the issue is simply Leopard or the problem goes deeper than that.
When I first upgraded to Leopard I had all kinds of trouble browsing my local network. Previewing a file on the server would cause the Macbook Pro to have a kernel panic and force a restart. About 50% of the time the restart wouldn't even work. It would just sit there after being shut down in some sort of weird limbo space. Not fully off, but certainly not powered up either.
I also started having problems in regards to audio. My MOTU Ultralite audio interface seemed to stop working (latest drivers and firmware installed). The Macbook Pro almost refused to see it as an output device, though input would work every once in a while.
So with all of these issues, I decided (since the MBP is my secondary machine) to see if an Erase and Install would solve the problems. And for a while I thought it did. That is until I tried to do some audio work again and my MOTU was only being recognized as an input device. Restarts have also gone back to our limbo area again. Leaving the MBP alone for a few minutes usually seems to resolve this along with disconnecting the battery.
So, my question is: is Leopard to blame or are there underlying issues here that Leopard has merely exposed. I have Leopard installed on a new Mac Pro at work and have had no problems with it there. I love the new OS, but it certainly doesn't seem to be showing my MBP any love what so ever.

Sounds like something nasty in the MOTU drivers to me, Brent. I see another , somewhat similar, post at http://discussions.apple.com/thread.jspa?messageID=7661455
Are you still suffering the KP's after the erase and install, or just the MOTU issues? Do the KP's occur if the MOTU is not connected and its drivers aren't installed? Will the computer restart normally if the MOTU is not connected?
My suggestion would be that you ditch the MOTU, and uninstall its drivers, until the issue is resolved (and if ditching it simply solves the problem then you know who to get in touch with!) to avoid confusing variables.
I doubt that Leopard has much directly to do with it, though it may be that MOTU need to update their drivers or firmware for compatibility, of course.
Finally, as with any FW device it is worth trying a new FW cable if things go awry. A bad cable can do nasty things under FW.
I guess you have checked out http://www.motu.com/techsupport/technotes/leopard-compatibility/view?searchterm= Leopard
Might be worth checking over at http://community.sonikmatter.com/forums/index.php?showforum=38 too, for people with a specific interest in this area.
Cheers
Rod
Message was edited by: Rod Hagen

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In your /Home/Library/ folder:
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/Home/Library/Application Support/iCal (copy the whole folder)
Also in /Home/Library/Application Support (copy whatever else you need including folders for any third-party applications)
/Home/Library/Keychains (copy the whole folder)
/Home/Library/Mail (copy the whole folder)
/Home/Library/Preferences/ (copy the whole folder)
/Home /Library/Calendars (copy the whole folder)
/Home /Library/iTunes (copy the whole folder)
/Home /Library/Safari (copy the whole folder)
If you want cookies:
/Home/Library/Cookies/Cookies.plist
/Home/Library/Application Support/WebFoundation/HTTPCookies.plist
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Revised 3/12/2008
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