IE6 is exploitable and is not trustworthy at all. You will encounter folk that will use it in spite of all warning so you wait to see it blow up.

Any reason to not suspect malware damage (again)?

And with that out of the way I'm guessing this is XP. There are compatible browsers such as Firefox without such exploits so easy to execute but then again you will encounter folk with all hooves firmly dug in. Let's hope you are not working with such folk.