I have a Rev A MBP 13" (2.26 Core 2 Duo with 4GB of RAM) running 10.7.3. When I run iMovie 09 (v8.0.6), it is constantly beach-balling. I have three clips from my GoPro Hero 2 camera that I copied from the SD card to my hard drive, and then imported into iMovie (5:46, 8:54 and 11:34 respectively, recorded at 960p 60fps). Each import took a couple of attempts as the spinning beach ball appeared, but I eventually got them into iMovie. Then I created a new project and attempted to copy the clips into the project. It took a number of attempts for each clip, as the application would stop responding on multiple occasions, requiring me to force quit iMovie and then re-start it. Now that I have them in the project, I started to edit it - and, naturally, when I split the project at the point I wished to make a cut, it beach-balled once again, requiring another force-quit and restart. As you can no doubt imagine, this is getting pretty old! Having read some threads with beach-balling issues in iMovie, I've removed Flip4Mac, Perian, and a couple other extra Preference Pane installs to see if they affect it, but have noticed no difference. Is the MBP just not up to the job at this spec? Or is there something else I could be looking at for possible conflicts or other issues?