OH....don't get me started on this one!
<tirade>
I'm using Notes R6 with a Notes R5 mail template (to comply with corporate standards) and I'm having no end of grief with Intellisync.
Repeating appointments keep duplicating each time I sync. Anniversaries periodically get added as an all day event on the day that I sync. That is, after synching, I get all birthdays listed as an all day event on that date...GRRR. It has corrupted my local replica twice now, forcing me to blow away my local replica and pulling down a new mail file from the server. Currently, I get messages about Intellisync trying to access a memory address that is not available and then it craps out.
</tirade>
OK. I'm done now.

Whew...I need a nap.