I get this message as well. I also get a similar message from Icedove. Unfortunately, rebooting the system does not seem to clear it up: I still get the message after a fresh reboot, and I'm the only user logged in. "/home" is NFS mounted, but I know I'm not running Iceweasel/Icedove, or even any other Mozilla derivative, from any other system where I use this home-directory.
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David L. Lambert
Software Developer
IBM office ph# 517-391-5236 (T/L 596-5236)
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