[Gurachn]

Thanks Don,
I think I will play around a bit more to see if I can determine what factors are influencing the situation, but I suspect that in the end it will be Plan B.
Luckily I have a fully patched version from my old computer on a flash drive so the reinstall will be pretty quick and painless.
I just hate giving in without figuring out what the heck is causing it though!
Cheers,

Grant