Array Merge Error on certain modules

For certain modules, namely:
Bookmarks and Taxonomy import/export via XML
I have noticed the following error

warning: array_merge() [function.array-merge]: Argument #1 is not an array in \drupal\includes\menu.inc on line 351.

It happens when I do quicklink in bookmarks and export xml in Taxonomy.

This error can be easily fixed by adding:
if (is_array($arguments))
$arguments = array_merge($arguments, explode('/', $arg));
on around line 351 of includes/menu.inc

At first I thought it was a problem for indvidiual modules, but it happens to several other modules (I can't remeber the rest).

Thanks.