Last modified: 2010-05-15 15:59:37 UTC
the function getParentCategories() in includes/Title.php usually returns an array of categories, but returns an empty string if a page belongs to no categories.The offending code is in line 2472 in Title.php.
The attached (trivial) patch makes the function return an empty array instead of an empty string if no results are found.
Created attachment 4165 [details]
patches the mentioned annoyance
This seems to have been fixed in the meantime.