I've got this up and running on my XP desktop, but am tryng to also get it on my Vista laptop. I've downloaded it (a couple of times) but although it's listed (twice) in View>Toolbars, it doesn't appear when ticked.
All that happens is that an empty blue toolbar under the address bar appears or disappears when the PCA toolbar is selected or deselected.
I'm using Firefox, as I am on the desktop - which may be out of action for a bit longer. It went off to have a new motherboard fitted and apparently when it was switched on, smoke suddenly appeared... Luckily, the plug was pulled before it burst into flames!