Currently the commit parser is crashing when it comes across a diff with an invalid character. This prevents any future commits from being parsed correctly. Here's the stack trace:
[16-Oct-2013 23:21:30 UTC] [2013-10-16 23:21:30] EXCEPTION: (PhutilProxyException) Error while executing task ID 119863 from queue. {>} (AphrontQueryExc eption) #1366: Incorrect string value: '\xD7</but...' for column 'changes' at row 1 at [/srv/phabricator/libphutil/src/aphront/storage/connection/mysql/ AphrontMySQLDatabaseConnectionBase.php:311]
[16-Oct-2013 23:21:30 UTC] #0 AphrontMySQLDatabaseConnectionBase::throwQueryCodeException(1366, Incorrect string value: '\xD7</but...' for column 'cha nges' at row 1) called at [/srv/phabricator/libphutil/src/aphront/storage/connection/mysql/AphrontMySQLDatabaseConnectionBase.php:278]
[16-Oct-2013 23:21:30 UTC] #1 AphrontMySQLDatabaseConnectionBase::throwQueryException(Object mysqli) called at [/srv/phabricator/libphutil/src/aphront /storage/connection/mysql/AphrontMySQLDatabaseConnectionBase.php:184]
[16-Oct-2013 23:21:30 UTC] #2 AphrontMySQLDatabaseConnectionBase::executeRawQuery(INSERT INTO `differential_hunk` (`changesetID`, `changes`, `oldOffse t`, `oldLen`, `newOffset`, `newLen`, `dateCreated`, `dateModified`) VALUES ('188829', ' ...) called at [/srv/phabricator/libphutil/src/xsprintf/queryfx.php:9]
[16-Oct-2013 23:21:30 UTC] #3 queryfx(Object AphrontMySQLiDatabaseConnection, %Q INTO %T (%LC) VALUES (%Q), INSERT, differential_hunk, Array of size 8 starting with: { 0 => changesetID }, '188829', ' .... .)
[16-Oct-2013 23:21:30 UTC] #4 call_user_func_array(queryfx, Array of size 6 starting with: { 0 => Object AphrontMySQLiDatabaseConnection }) called at [/srv/phabricator/libphutil/src/aphront/storage/connection/AphrontDatabaseConnection.php:28]
[16-Oct-2013 23:21:30 UTC] #5 AphrontDatabaseConnection::query(%Q INTO %T (%LC) VALUES (%Q), INSERT, differential_hunk, Array of size 8 starting with: { 0 => changesetID }, '188829', ' .....) called at [/ srv/phabricator/phabricator/src/infrastructure/storage/lisk/LiskDAO.php:1251]
[16-Oct-2013 23:21:30 UTC] #6 LiskDAO::insertRecordIntoDatabase(INSERT) called at [/srv/phabricator/phabricator/src/infrastructure/storage/lisk/LiskDAO.php:1118]
[16-Oct-2013 23:21:30 UTC] #7 LiskDAO::insert() called at [/srv/phabricator/phabricator/src/infrastructure/storage/lisk/LiskDAO.php:1087]
[16-Oct-2013 23:21:30 UTC] #8 LiskDAO::save() called at [/srv/phabricator/phabricator/src/applications/differential/storage/DifferentialChangeset.php: 77]
[16-Oct-2013 23:21:30 UTC] #9 DifferentialChangeset::save() called at [/srv/phabricator/phabricator/src/applications/differential/storage/Differential Diff.php:110]
[16-Oct-2013 23:21:30 UTC] #10 DifferentialDiff::save() called at [/srv/phabricator/phabricator/src/applications/repository/worker/commitmessageparser /PhabricatorRepositoryCommitMessageParserWorker.php:284]
[16-Oct-2013 23:21:30 UTC] #11 PhabricatorRepositoryCommitMessageParserWorker::attachToRevision(Object DifferentialRevision, PHID-USER-ahkclez2z322xrcr34rq) called at [/srv/phabricator/phabricator/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php :154]
[16-Oct-2013 23:21:30 UTC] #12 PhabricatorRepositoryCommitMessageParserWorker::updateCommitData(..., ..., null) called at [/srv/phabricator/phabricator/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryGitCommitMessageParserWorker.php:53]
[16-Oct-2013 23:21:30 UTC] #13 PhabricatorRepositoryGitCommitMessageParserWorker::parseCommit(Object PhabricatorRepository, Object PhabricatorRepositoryCommit) called at [/srv/phabricator/phabricator/src/applications/repository/worker/PhabricatorRepositoryCommitParserWorker.php:44]
[16-Oct-2013 23:21:30 UTC] #14 PhabricatorRepositoryCommitParserWorker::doWork() called at [/srv/phabricator/phabricator/src/infrastructure/daemon/workers/PhabricatorWorker.php:84]
[16-Oct-2013 23:21:30 UTC] #15 PhabricatorWorker::executeTask() called at [/srv/phabricator/phabricator/src/infrastructure/daemon/workers/storage/Phab ricatorWorkerActiveTask.php:122]
[16-Oct-2013 23:21:30 UTC] #16 PhabricatorWorkerActiveTask::executeTask() called at [/srv/phabricator/phabricator/src/infrastructure/daemon/workers/Ph abricatorTaskmasterDaemon.php:20]
[16-Oct-2013 23:21:30 UTC] #17 PhabricatorTaskmasterDaemon::run() called at [/srv/phabricator/libphutil/src/daemon/PhutilDaemon.php:81]
[16-Oct-2013 23:21:30 UTC] #18 PhutilDaemon::execute() called at [/srv/phabricator/libphutil/scripts/daemon/exec/exec_daemon.php:112]
[16-Oct-2013 23:21:30 UTC] PHP Fatal error: Uncaught exception 'Exception' with message 'Process exited with an open transaction! The transaction will be implicitly rolled back. Calls to openTransaction() must always be paired with a call to saveTransaction() or killTransaction().' in /srv/phabricator/ libphutil/src/aphront/storage/connection/AphrontDatabaseTransactionState.php:71