Is there a way to get blackberry desktop to sync with "favorite" public folders (for contacts or Calendars) that are cached locally in Outlook?

Every time I try, BB Desktop bails out after a small number of records with:

"Unable to get data from an Outlook or MS Exchange record..."

Yes, I've nuked the Intellisync configuration and started over. I've tried different versions of the desktop software. They only thing that works is to turn off caching of public folder favorites in Outlook, which *kills* performance in Outlook because the Exchange server isn't on the local LAN.

Anyone have any creative solutions / suggestions? Unfortunately, "stop using public folders" isn't one of the options.

-R