macromedia has released a patch (7.0.1) for flash mx 2004 and flash mx 2004 professional (the first patch to the windows version of the authoring tool in the history of flash). it's a bug-fix patch that addresses stability and performance issues, but introduces no new features.
get the patch here:
http://www.macromedia.com/support/flash/downloads.html
read the long list of what's fixed here, including 34 crash fixes!:
http://www.macromedia.com/support/documentation/en/flash/mx2004/releasenotes.html#Update