If you are experiencing a crash when entering text into the address bar, you can correct the problem by removing the autocomplete.xpt file from your Firefox components directory, for example C:\Program Files\Mozilla Firefox\components. To avoid this crash, do not install a new installer build on top of an older zipped build.
This problem seems to only be impacting zipped build users of previous releases installing installer builds of 1.0.1. If you install a zipped 1.0.1 on top of an earlier zipped build, things seem to be working, and if you install an installer build over a previous installer build then things seem to also work.
If you're experience doesn't fit this, and you're crashing with entering text in the address field (or possibly the search field and forms on web pages) please let me know. Thanks.
update: if these steps aren't working, then simply delete your entire Firefox directory and reinstall. The above approach was meant to be as surgical as possible. But, before you delete that folder, please uninstall and send me a list of what's left in that folder. Something else there is conflicting, probably from a third-party extension that inappropriately installed to the application directory.
