It is a Vista issue, but indirectly, and I don't know the cause. One of the add-ons which is essential to me is the Home button (I say essential, OK, it's not life and death, but I would seriously miss it if it wasn't there), and the installation of this seems to somehow conflict with Roboform, as once installed, Roboform won't work, I get a blank, but unremovable, toolbar, and I get an error message every time I open or close Sea Monkey, to the effect of the Roboform adapter isn't compatible with my version of SM. Well, they are both the latest versions and it all works fine on my XP machine, so I can only assume that something along the line isn't Vista compatible, and it seems to be the Home button add-on.