Graphical issues on character models (Mac)

[Lozi]

I have been experiencing strange graphical issues on certain games, specifically Super Smash Bros. Brawl and Zelda: The Wind Waker. The issue is shown in the screenshots below:




As far as I can see the problem only occurs on character models. I assume it's some kind of texture/lighting glitch but I have no real experience in these things so I would appreciate any help greatly.

I have got both games working with no graphical issues on my Windows pc but they lag due to it's poor specs. On my more powerful Imac both run smoothly but the graphical issues are very annoying.

I have tried several different builds of dolphin and have changed around a lot of the settings with no luck. I have also googled the issue but was unable to find anything useful.

I'm at the point where I'm considering just installing boot camp and running it that way, however it seems like a heavy handed solution to the problem so I thought i'd ask here first.

Also it might be worth noting that Dolphin gives this error upon running a game:

"Internal LZO error - lzo_init()failed"

This has never occurred on my windows machine and I have no idea if it's related to the issue, I have been unable to find an explanation on google but if it isn't related then it doesn't bother me to much.

My Imac specs are:
Mac OS X 10.6.6
Intel Core 2 Duo 2.93 GHz
4 GB RAM
NVIDIA GeForce GT 120

Thanks for any help and advice

Laurence