Logic Pro 8 and Delta 1010 random audio stuttering

Since installing Logic Pro 8, I have two problems which I suspect may be related:
1. Launching Logic will sometimes freeze my Mac and bring up that familiar screen that says I must immediately restart. This seems random, happening maybe one time out of 7 or 8.
 2. The other problem is that launching Logic 8 sometimes results in apparent misbehavior by my PCI audio card, a Delta 1010. In such cases, I will immediately hear something that sounds like very loud white noise coming out of the audio interface and into my mixer, but with a rapid stutter (confirmed by the VU meters on the Delta control panel, which vibrate like they're having a seizure). Nothing seems to stop the noise, except quitting Logic and restarting the Mac. This misbehavior seems quite random and there's nothing I've been able to do to track it down or make it repeatable -- all I can do is quit Logic, restart, and hope that this time it works. Fortunately, if I can finally get Logic 8 launched without the noise factor, it runs fine and virtually never crashes.
Anyone have any similar problem or ideas about the cause? I'm thinking about replacing the Delta 1010 with a new Firewire audio interface, in anticipation of buying a new Mac later this year. But I don't want to do it now if it's not the 1010's fault.
(Details: I am using the latest driver for the Delta 1010, downloaded from M-Audio's web site; the latest version of Logic 8 (8.0.1); and Mac OSX 10.4.11. I've got this all running on an older Mac, a G4 Dual 1.25 with 2 GIGS Ram. I've got the Delta 1010 selected as the default input and output in Audio MIDI setup, using the Mac built-in output only for the System Output. None of these issues were happening with Logic 7, and I haven't changed anything since then, except for installing Logic 8 and gradual Tiger upgrades. I also seem to have no problems using the Delta 1010 with Final Cut Pro. I suppose the possibilities are: incompatibility with Logic 8 and some other software, the Delta 1010 card is going bad, an issue with other connected peripherals (USB hub, Firewire Hub, Edirol UM-550), bad ram... or something else?)

Hi,
There are two things to bear in mind here.
1) In my experience, it takes a little longer for the driver to kick in after boot up, so wait a minute before launching Logic.
2) I recently reinstalled the 10.4.10 driver on my friend's Mac (same config as yours) and it now works as it should.
Best Wishes

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