Bonzi in Bookmarks

[Andy_P2002]

Here's a slightly odd one.

Whenever I run Spybot S+D it alerts me to a cookie from BonziBuddy
http://www.bonzi.com/netscape/voicenet.htm in my wife's Firefox bookmarks on the PC.
Spybot always says it has removed it successfully, but it is always back the next time.

Today, I went hunting for it and I found that if I look at the bookmarks.htm file in a browser window, sure enough it is there.

But if I look at the same list of bookmarks in firefox itself (either on the drop-down list or in "Organise Bookmarks") I cannot see it!

I *may* have had a full BonziBuddy infectio in the past, but thought it was long gone.

Anything I can do?
(I've checked everything in this topic:
http://forums.spybot.info/showthread.php?t=39588 and it all seems clear).