Start with The Basics! Many problems are solved by Updating and by Repairing Disk Permissions. Don’t be tempted to skip over this section because you think your problem isn’t “basic” – it may very well turn out to be.
Asterisks Bug: This one is nasty. Click here for work-arounds.
Font Weeding. If the application hangs and freezes a lot, particularly at startup, see here.
Can't Open Files: This can be because of non-letter characters in the file name or path. See here.
Can't Save to Server: Sorry: this one is still with us. Microsoft thought they had fixed it, but it's back. There's a Severity 1 incident open on it.
Word won't open documents the way I left them. It will now!