I'm running Logic 8 on a MacBook Pro 2.26 Ghz Intel Core 2 Duo, 2 GB 1067 MHz DDR3, OSX 10.6.3. Lately (I think - can't prove it, but it feels like something new) I've been having severe problems with logic overloading. It seems like suddenly I can hardly get through a single song without this happening, even if it uses only a few channels and hardly any plugins. What usually happens is that it goes along fine for a while, with not much CPU-usage - And then suddenly bottoms out. More often than not, this happens on the second or third pass of a loop - Generally, I've a feeling that CPU-usage increases on each pass of a loop (are there any known memory-leakage problems?). In another thread, I found this benchmark test (http://www.evan.se/logicprobenchmark/). When I run this, I can can only barely manage one track un-muted - That can't be right, can it?