本人在使用1.2.8的时候，在Blog里面发表新文章的时候，经常出现下面的错误提示：
Fatal error: Uncaught exception 'Exception' with message 'BayesianTokens::updateOccurrencesFromTokensArray: Cannot update occurrences of token 'blog?.' in D:\WebServer\Apache2.2\htdocs\blog\class\dao\bayesiantokens.class.php:197 Stack trace: #0 D:\WebServer\Apache2.2\htdocs\blog\class\dao\bayesiantokens.class.php(167): BayesianTokens->updateOccurrencesFromTokensArray('4', Array, 0, 1, '0', 4) #1 D:\WebServer\Apache2.2\htdocs\blog\class\bayesian\bayesianfiltercore.class.php(87): BayesianTokens->incNonSpamOccurrencesFromTokensArray('4', Array, '0', 4) #2 D:\WebServer\Apache2.2\htdocs\blog\class\bayesian\bayesianfiltercore.class.php(108): BayesianFilterCore->train('4', '???????????????...', '<p>????????????...', '', '', '', false) #3 D:\WebServer\Apache2.2\htdocs\blog\class\action\admin\adminaddpostaction.class.php(158): BayesianFilterCore->trainWithArticle(Object(Article)) #4 D:\WebServer\Apache2.2\htdocs\blog\class\controller\controller.class.php(347): AdminAddPostAction->perform() #5 D:\WebServer\Apache2.2\htdocs\blog\ad in D:\WebServer\Apache2.2\htdocs\blog\class\dao\bayesiantokens.class.php on line 197

有些时候文章已经被成功发表了，有些时候则会失败，为什么啊？！

是一个bug吗？！