Fatel error Cannot use object of type stdClass as array

Getting the following error after creating a matrix field and trying to edit a node from the content type =

Fatal error: Cannot use object of type stdClass as array in /d69/sites/all/modules/matrix/matrix.module on line 440

This was with dev2 version downloaded on 05/2/08

Thanks for your work on the matrix module, I will help with testing as much as I can.
Regards, Lowell