Go to HD/Library/QuickTime/ and delete any DivX components you find. That
has solved the problem for some people.
If that doesn't fix it, drag Macintosh HD/Users/<Your
User>/Library/Preferences/com.apple.internetconfig.plist and
com.microsoft.explorer.plist to the Desktop. Re-launch Internet Explorer
and see if it crashes. If it still does, move the Internet Preferences
files back. If it does not, you can trash the Internet Preferences files.
If that doesn't help, try moving the Macintosh HD/Users/<Your
User>/Library/Preferences/Explorer to the Desktop and see if that helps. If
so, drag the "Favorites.html" file into the new Explorer folder within the
Preferences folder, and delete the rest. If not, move the folder back.
Try repairing permissions.
For OS 10.2.x:
Go to Macintosh HD/Applications/Utilities. Open up Disk Utility. Select
your hard disk, then click the First Aid tab. Click the button to "Repair
Disk Permissions".
For OS 10.1.5:
Download the Repair Privileges utility, free from Apple, and run it:
<
http://docs.info.apple.com/article.html?artnum=106900>
Run Disk First Aid. Instructions on how to run it in OS X are located on
the Apple Knowledge Base.
<
http://docs.info.apple.com/article.html?artnum=106214>