hey So, i've been having a problem the last couple weeks, where my calendar would force close several times a day (when syncing). I finally found a solution. I had installed android agenda widget a while back and that was causing the problem. I uninstalled it today, but the problem wasn't fixed until I cleared out the data in my calendar (menu, settings, manage applications, then click on com.android.providers.calendar and clear out the data) and re synced it with google. Just in case you are wondering, I then reinstalled android agenda widget and the problem returned. Uninstalled it again, recleared my data and now it syncs perfectly to my google account. Just thought this might help someone out of they were having a problem with the calendar force closing.