Just seen that HP are doing a Worldwide recall of its power leads for products sold between September 2010 & June 2012.
In the article on the BBC website its stated that 6 million affected leads where sold in just Canada & the USA!
Seems the leads overheat and melt causing injury.
Jut checked my lead and i don't think i'm affected although it is quite warm, will watch this space with interest!
Full article for you to check if you are affected - BBC News - HP recall