I recently upgraded to opennms 1.8.3 (Debian lenny package, details in attached file).
Last night, opennms discovered a new node. When viewing this node in the webui, a exception is thrown: (java.lang.ArrayIndexOutOfBoundsException: -1 ; full stack trace attached).
This is occuring, it seems, because vlan.vlantype is set to -1. Other nodes have this field set to NULL, I believe.