I'm seeing a bunch of these errors in our PHP logs:
```
[17-Mar-2015 18:41:31 Australia/Sydney] [2015-03-17 18:41:31] EXCEPTION: (AphrontParameterQueryException) Expected a numeric scalar or null for %Ld conversion. Query: id
IN (%Ld) at [<phutil>/src/xsprintf/qsprintf.php:284]
[17-Mar-2015 18:41:31 Australia/Sydney] arcanist(head=master, ref.master=b961869edac9), phabricator(head=master, ref.master=98899c822eb9), phlab(head=master, ref.master=d
ddf486a2aec), phutil(head=master, ref.master=ce3959b4046f)
[17-Mar-2015 18:41:31 Australia/Sydney] #0 _qsprintf_check_scalar_type(string, string, string) called at [<phutil>/src/xsprintf/qsprintf.php:258]
[17-Mar-2015 18:41:31 Australia/Sydney] #1 _qsprintf_check_type(array, string, string) called at [<phutil>/src/xsprintf/qsprintf.php:129]
[17-Mar-2015 18:41:31 Australia/Sydney] #2 xsprintf_query(AphrontMySQLiDatabaseConnection, string, integer, array, integer) called at [<phutil>/src/xsprintf/xsprintf.ph
p:70]
[17-Mar-2015 18:41:31 Australia/Sydney] #3 xsprintf(string, AphrontMySQLiDatabaseConnection, array) called at [<phutil>/src/xsprintf/qsprintf.php:64]
[17-Mar-2015 18:41:31 Australia/Sydney] #4 qsprintf(AphrontMySQLiDatabaseConnection, string, array) called at [<phabricator>/src/applications/differential/query/Differe
ntialDiffQuery.php:131]
[17-Mar-2015 18:41:31 Australia/Sydney] #5 DifferentialDiffQuery::buildWhereClause(AphrontMySQLiDatabaseConnection) called at [<phabricator>/src/applications/differenti
al/query/DifferentialDiffQuery.php:45]
[17-Mar-2015 18:41:31 Australia/Sydney] #6 DifferentialDiffQuery::loadPage() called at [<phabricator>/src/infrastructure/query/policy/PhabricatorPolicyAwareQuery.php:22
7]
[17-Mar-2015 18:41:31 Australia/Sydney] #7 PhabricatorPolicyAwareQuery::execute() called at [<phabricator>/src/applications/differential/conduit/DifferentialQueryDiffsConduitAPIMethod.php:41]
[17-Mar-2015 18:41:31 Australia/Sydney] #8 DifferentialQueryDiffsConduitAPIMethod::execute(ConduitAPIRequest) called at [<phabricator>/src/applications/conduit/method/ConduitAPIMethod.php:65]
[17-Mar-2015 18:41:31 Australia/Sydney] #9 ConduitAPIMethod::executeMethod(ConduitAPIRequest) called at [<phabricator>/src/applications/conduit/call/ConduitCall.php:134]
[17-Mar-2015 18:41:31 Australia/Sydney] #10 ConduitCall::executeMethod() called at [<phabricator>/src/applications/conduit/call/ConduitCall.php:84]
[17-Mar-2015 18:41:31 Australia/Sydney] #11 ConduitCall::execute() called at [<phabricator>/src/applications/conduit/controller/PhabricatorConduitAPIController.php:88]
[17-Mar-2015 18:41:31 Australia/Sydney] #12 PhabricatorConduitAPIController::processRequest() called at [<phabricator>/src/aphront/AphrontController.php:33]
[17-Mar-2015 18:41:31 Australia/Sydney] #13 AphrontController::handleRequest(AphrontRequest) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:196]
[17-Mar-2015 18:41:31 Australia/Sydney] #14 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink) called at [<phabricator>/src/aphront/configuration/AphrontApplicationConfiguration.php:121]
[17-Mar-2015 18:41:31 Australia/Sydney] #15 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phabricator>/webroot/index.php:19]
```