differences in jit.gl.render between 1.6 & 1.7?

Hello all.

I've been noticing *something* different in some of my gl patches as
of late, and I think I found it. I am not sure if it has been
mentioned so far.

In max Max 4.6/Jit1.6, when using [jit.gl.render @blend_enable 1
@erase_color .xx .xx .xx .01] (or some variant in which alpha is < 1.
, much more noticeable as it approaches 0.0), a jit.window will draw
as expected, and when switching to fullscreen, the color xx. xx. xx.
will present itself as the background.

In Max 5, running the same patch, the window will render the
background color as expected, but when made fullscreen, the window
draws itself black, then slowly fills in the background color. When
the alpha is set to the lower bounds, < .10 for example, the color
will not fully come up.

I would expect this to behave as it did in Max 4.6/Jit1.6.

I have a simple patch that illustrates the example below (obviously
you'll need to run it in max 4.6 & 5 to see the difference).

Thanks for any explanation, fix, or clarification.

Macbook Pro 2Ghz, OSX 10.5.4, ATI Radeon X1600, Max5.0.4/Max 4.6.3 Jitter 1.6.4

~scott