I've just reinstalled the filesystem again. I've just realised the only thing I installed again was FaceTime. Taken it back off and its stopped KP again. Could it be possible that facetime beta is clashing with one of the VMware Kext?
I'll take it back in tomorrow and get them to replace it anyway, otherwise i will feel like i'm living on the edge with this machine. it could KP at any point, want it sorted before apple care runs out.
Yea that is certainly possible. Mac OS betas also regularly have problems with VMWare or Parallels kexts.
I understand how you have lost faith in your computer