How come when i visit some sites i get the little triangle in the bottom left corner sayin "done dut with errors"

This isnt anything to do with you or your PC, its to do with the website(s) itself. It just means that they havent loaded properly. Does this happen repeadetly?

all the time and on the same site (not this one)

It's to do with the site itself. They have a javascript error (you can see what it is exactly by double-clicking on the yellow triangle).

Basically, there is a bad bit of code in their web page.

cheers for that thought for a minute i`d have to get on xx world for yet another hour :-D