firefox crashes when I use BASH (ubuntu 12.04 lts)

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http://askubuntu.com – I have been having the most annoying problem: every time I open BASH when I am using firefox, it (FF) crashes. Not immediately, but when I start typing - no matter what I type - it crashes... I have recently (today and yday) updated my system using the update manager, and I suspect it has something to do with this, but being a total beginner, I don't know how to review my latest upgrades and uninstall the ones that are responsible. perhaps I need to check for FF updates? I don't think so - I am using the latest (?) version 14.0.1. Does anyone have any clue how to get to the bottom of this? (HowTos)