Odd graphics failure in Premiere Pro using Lion

Question

Just fired up Premiere Pro for the first time since the Lion update, and it's having some issues.
See in the work panes at the bottom, that's one audio clip.
When I move it about it ghosts like an old school Windows graphics error, and goes mental.
If I press play and cause a new event to happen, like the playing cursor moving across the path of the image, it wipes it correct, but it's not exacty easy to work like this. Is it a compatability issue? Or is my Macbook about to fry or something? I need to know as I am meant to be working on a video for charity, which I volunteered to do, but now might not be able to if this is going to happen.
Was thinking of going Final Cut Pro X, not sure if this 2009 MBP can handle it though.
Anyway, if you have any ideas on why the above issue is happening, I'd be grateful, I need PP to work for me!
Edit: apologies, I see there's already a thread on this. Can't see a way to delete :/

Answer 1

....I " second" Bill's motion !!! I too had to recently replace my laptop, and like Bill, was able to find a " refurbished" Asus G750JW for much less than normal cost.Yesterday, I saw some that  were selling for $1,000,but, I think you can do better than that. I have been amazed atthe performance increase over my previous Asus i7 laptop. Some of that was due to the software itself....the newest version of PPro CCloud 2014 contains improvements which eliminated problems editing certain DSLR footage and increased the amount of system memory being used. Having the 24 GB of memory certainly improves things along with the much faster Haswell 4700 HQ CPU......it normally "turbos" itself up to 3.2 to 3.4 Ghz under load, with ALL cores in use ! The 765M Nvidia  GPU  does very well....I overclock it too,using MSI Afterburner and it seems to result in faster exporting times, direct out of PPro, using the DSLR footage on a timeline with multiplevideo tracks and accelerated effects. I believe the biggest improvement came from using two newer high quality SSDs. I used the cheaper Crucial , slightly older SSDs than Bill's.....his Samsung Pro 850s are currently the best. I used a Crucial M500 forthe boot drive and an M4 for the media drive. Performance on my machine was slightly lower than Bill's because of his better SSDs.....but still amazing,for a laptop!