Looks like there's an initialization problem with the targetname attribute that crept in. This one threw me for a loop for a bit. If you hook up attrui to jit.gl.multiple and choose the targetname attribute, you'll see the value the object has stored. Sending a loadmess targetname elmt, it'll work. I've logged this as a bug and will fix it ASAP. Sorry for the inconvenience:
Here's a better solution. This seems to have been a long standing bug in jit.gl.multiple. As long as you give both the destination name and the number of inlets to jit.gl.multiple (i.e. [jit.gl.multiple tester 1]), things will work as they should:
Thank you for the suggestion,
Max crashes if you set the @targetname after the @glparams (forgot to tell it).
An other issue is the target object has a @scale set to 0.1, that [jit.gl.multiple] in Max6 does not take into account.