I have an 8700g and use Outlook 2003. I just upgraded to desktop 4.2 and started seeing the same crashes that everyone is talking about. Sometimes it's calendar entries, other times its contacts. When I disable one, the other will casuse a crash and vice versa. I have removed all but 5 calendar entries that I entered on my handheld and those are still causing it to crash.
What's more, I can drop back to the desktop 4.1 and everything works just fine. No crashes, everything sync, etc. Seems to me like a lot of the issues are all related around the 4.2 OS. I have followed every trick (removing attachments, html formatting, etc) and nothing works. And to make matters worse it is sporadic. I can do go a day or two with no issues, then BLAM, a crash. Dropping back to desktop 4.1 is the only thing that has worked for me.