PHP error: Array to string conversion in class_fiInventory.inc:199

Only in 1.3 branch:

=== Error === 
PHP error: Array to string conversion 
(/usr/share/fusiondirectory/plugins/admin/systems/fusioninventory/class_fiInventory.inc, 
line 199)
=== /Error ===
=== Trace ===
Trace[1]:function implode
File : 
/usr/share/fusiondirectory/plugins/admin/systems/fusioninventory/class_fiInventory.inc
Line : 199
Type : -
   ")(macAddress=",array(array("96:00:00:14:4b:82"))