E75 and Calendar Sync

I have a convoluted synchronization setup.

• I use Thunderbird as my primary mail client.
• Lightning is my calendar application and is configured to synchronize with Yahoo! Calendar.
• I also have iCal synchronized with Yahoo! Calendar.
• Finally using Nokia's iSync plugin, I synchronize my calendar to my Nokia E75 phone.
• Also at times, I synchronize my phone with Ovi.com and with Nokia Ovi PC suite.

A few weeks back when I was upgrading the phone firmware, the calendar synchronization broke. I got this error message.

[Y man] There was an error getting data from the phone. The synchronization may have been canceled on the phone.
Device “Y man” synchronization failed.

This seems to be a common problem but nobody seems to have found a working solution. I tried to locate the calendar database on the phone to see if deleting it would help. But could not locate the same. Was contemplating a hard reset and restore from backup when I accidentally discovered a working solution.

Calander -> Select Any date -> Options -> Delete -> Before Date. This cleans up the calendar. A synchronization after this worked. Now you know what do when your calendar sync screws up.

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I'd love to go out with you, but I'm converting my calendar watch from Julian to Gregorian.