Thanks for the reassurance, Liam. I'm satisfied that the machines were clean when I installed Roboform, so all should be ok. Firewall in the router, and Zonealarm Plus and PCCillin on each machine, so hopefully fairly well protected. One can't be too careful, though.
I don't like the re-editing gizmo much either - it caught me out last night in the same way.
Cheers
AA