Closing the lid to sleep makes Air panic and shut down

Hello guys, need some tips or advise here.

I have a first gen MBA 1.6, and recently (like two days ago) every time I close the lid it shuts down. It doesn't happen all the time, but it does happen more times than it doesn't. Booting it up after, a window tells me a kernel problem has occurred.

Sorry, no real knowledge of the underpinnings of how software works - so if any of you have ever experienced this, or have some tips or diagnoses, I will certainly be thankful for it.

Thanks.

LinMac said:

Try the normal debug steps such as reset SMC/NVRAM, repair permissions, clearing caches with Snow Leopard Cache Cleaner or Onyx, or reinstall the OS.

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Thanks a lot LinMac.

Did all the Onyx cleaning and permissions processes and an SMC reset and that did the thing.