groucho75, The usual solution to your problem is to delete your Temporary Internet Files. More info at the link below.
Hope This Helps,
Using IE6, when trying to save pictures from the internet, it no longer lets me save them as JPGs. It used to put the name of the picture in the 'Save as' field, but now I can only save them as 'untitled' BMP bitmap files. I've looked high and low in my internet settings but I'm baffled. How can I get it to save JPGs again. Any conclusive help counts as your good deed for the day!