I get two notices when running Parser tests (as of revision 31715 of parserTests.inc) as follows:

Notice: Array to string conversion in D:\SVN\phase3\maintenance\parserTests.inc on line 319

Line 319 being:

$out = $this->tidy ( implode( ' ', $wgOut->getCategoryLinks() ) );

Having that getCategoryLinks() returns an array of arrays, imploding it once will provide tidy with non-string parameters.

Version: 1.12.x
Severity: enhancement