So I would suggest that it is not an infected card.
Clearly, since none of you guys can replicate the problem, it is in some way local to my environment. But why only Mepis and only then until I can get past it the first btime?
A couple of additional observations -
The Mozilla page includes a yellow rectangle containg a message begins
You are currently using a snapshot taken April 26 2008...
which I assume is generated by the connection to Mozilla site?
Subsequently, one of the persistently bombarding pop-ups is headed
The page http://backup,getprz.com says