it was my main website I was more worried about, I put a lot of work into it and would hate for something to go wrong. Mind you, it's all backed up so I don't suppose it would be too much of a disaster.
Anyway, I remembered that I'd got an absolute duplicate website I'm not really doing much with so I carried out all the upgrade with the new 13 patch, as well of the upgrade to Joomla and all seems okay.