http://forums.mozillazine.org/viewtopic.php?f=38&t=3049775
http://forums.mozillazine.org/viewtopic.php?f=38&t=3049746
The fix suggested didn't work for me.
http://forums.mozillazine.org/viewtopic.php?f=38&t=3049759
"It takes a while longer for the portable apps versions to upgrade as John Haller and his team need the source code from Mozilla.
Although I'll check their forums as soon as I leave here.. In the meantime...stay off strange websites"
See my posts as Mudder, fingers too sore for re-typing.