I could just reproduce!
But only after change the field limit in the xf_thread table for the "title" field and typed a VERY VERY long thread title!
The error is caused in the indexer!
Did you change the xf_thread field "title" values?
Code:
Server Error
Mysqli statement execute error : Data too long for column 'title' at row 1
Zend_Db_Statement_Mysqli->_execute() in D:\Entwicklung\Webserver\xenforum\library\Zend\Db\Statement.php at line 297
Zend_Db_Statement->execute() in D:\Entwicklung\Webserver\xenforum\library\Zend\Db\Adapter\Abstract.php at line 479
Zend_Db_Adapter_Abstract->query() in D:\Entwicklung\Webserver\xenforum\library\XenForo\Search\SourceHandler\MySqlFt.php at line 110
XenForo_Search_SourceHandler_MySqlFt->_pushToIndex() in D:\Entwicklung\Webserver\xenforum\library\XenForo\Search\SourceHandler\MySqlFt.php at line 82
XenForo_Search_SourceHandler_MySqlFt->insertIntoIndex() in D:\Entwicklung\Webserver\xenforum\library\XenForo\Search\Indexer.php at line 44
XenForo_Search_Indexer->insertIntoIndex() in D:\Entwicklung\Webserver\xenforum\library\Tinhte\XenTag\XenForo\Search\Indexer.php at line 18
Tinhte_XenTag_XenForo_Search_Indexer->insertIntoIndex() in D:\Entwicklung\Webserver\xenforum\library\XenForo\Search\DataHandler\Thread.php at line 59
XenForo_Search_DataHandler_Thread->_insertIntoIndex() in D:\Entwicklung\Webserver\xenforum\library\Tinhte\XenTag\XenForo\Search\DataHandler\Thread.php at line 28
Tinhte_XenTag_XenForo_Search_DataHandler_Thread->_insertIntoIndex() in D:\Entwicklung\Webserver\xenforum\library\XenForo\Search\DataHandler\Abstract.php at line 275
XenForo_Search_DataHandler_Abstract->insertIntoIndex() in D:\Entwicklung\Webserver\xenforum\library\XenForo\DataWriter\Discussion.php at line 698
XenForo_DataWriter_Discussion->_updateSearchIndexTitle() in D:\Entwicklung\Webserver\xenforum\library\XenForo\DataWriter\Discussion.php at line 635
XenForo_DataWriter_Discussion->_indexForSearch() in D:\Entwicklung\Webserver\xenforum\library\XenForo\DataWriter\Discussion.php at line 464
XenForo_DataWriter_Discussion->_postSave() in D:\Entwicklung\Webserver\xenforum\library\XenForo\DataWriter.php at line 1409
XenForo_DataWriter->save() in D:\Entwicklung\Webserver\xenforum\library\XenForo\TagHandler\Thread.php at line 78
XenForo_TagHandler_Thread->updateContentTagCache() in D:\Entwicklung\Webserver\xenforum\library\phc\XenTagImport\Importer\XenTag.php at line 161
phc_XenTagImport_Importer_XenTag->stepXTI() in D:\Entwicklung\Webserver\xenforum\library\XenForo\Importer\Abstract.php at line 97
XenForo_Importer_Abstract->runStep() in D:\Entwicklung\Webserver\xenforum\library\XenForo\ControllerAdmin\Import.php at line 187
XenForo_ControllerAdmin_Import->_runStep() in D:\Entwicklung\Webserver\xenforum\library\XenForo\ControllerAdmin\Import.php at line 239
XenForo_ControllerAdmin_Import->_startStep() in D:\Entwicklung\Webserver\xenforum\library\XenForo\ControllerAdmin\Import.php at line 182
XenForo_ControllerAdmin_Import->actionStartStep() in D:\Entwicklung\Webserver\xenforum\library\XenForo\FrontController.php at line 347
XenForo_FrontController->dispatch() in D:\Entwicklung\Webserver\xenforum\library\XenForo\FrontController.php at line 134
XenForo_FrontController->run() in D:\Entwicklung\Webserver\xenforum\admin.php at line 13