Array passed to drupal_strlen

Hi,

I am getting an error like this reported in my Recent Log Entries for every taxonomy term:

Oops! array passed to drupal_strlen ! Array is: array ( 0 => 'Sales Rep./Consultant', ). Workaround - using first element of the array.

It doesn't seem to have any effect on the imported nodes i was just wondering if anyone could help shed some light on why this is happening?

Thanks

AlxM