UPDATE
This appears to be fixed now! Great work to Plaxo for getting this fixed!

ORIGINAL POST

Today I went to re-setup my Plaxo syncing with Google Calendars, only to find that Plaxo is unable to authenticate against my Google account. I fired off a message to Plaxo explaining that it was not working and they promptly responded:

Hi Jamie,
Thank you for contacting Plaxo Customer Care.

As I understand, you are unable to sync Plaxo with Google as you are seeing an error message stating that it is invalid. This is a known issue and our engineers are working on it. We appreciate your patience.

Please let me know if you have any further questions.

Thank you.
Ricky
Plaxo Customer Care