Auto-reported via Play Store:

java.lang.IllegalArgumentException: Unable to compute LAST_DATE
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:165)
at android.database.DatabaseUtils.readExceptionWithOperationApplicationExceptionFromParcel(DatabaseUtils.java:158)
at android.content.ContentProviderProxy.applyBatch(ContentProviderNative.java:456)
at android.content.ContentProviderClient.applyBatch(ContentProviderClient.java:120)
at at.bitfire.davdroid.resource.LocalCollection.commit(LocalCollection.java:311)
at at.bitfire.davdroid.syncadapter.SyncManager.pullChanged(SyncManager.java:207)
at at.bitfire.davdroid.syncadapter.SyncManager.synchronize(SyncManager.java:88)
at at.bitfire.davdroid.syncadapter.DavSyncAdapter.onPerformSync(DavSyncAdapter.java:133)
at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:247)

DAVdroid 0.6.3, Android 4.0.3 - 4.0.4, Indigo (Indigo)