Hi,

I am preparing a migration of about 70% of the 2D content in a Facebook game from Flash display to Starling. Recently, I noticed an issue which seems to only occur in Chrome's Flash Player. Every minute or so, the screen will appear to Flash. Having taken video of it and slowed it down, what's happening is that the entire Stage 3D rendered image briefly renders stretched out as if the stage was resized for one frame, then immediately returns to normal. The standard Flash display content stays as normal.

It seems to happen at random only under Chrome. i'm using latest Chrome, latest Flash Player and fully updated Mac OS X. I can reproduce it pretty reliably by switching browser tabs, then coming back to the game, the content seems to normally jump straight after the tab switch.

Unfortunately I can't share video or source for this as it's a yet-to-be-released feature. I'm hoping to get a proof-of-concept together with a more basic scene on a web page and see if it still occurs there. However, I can list some of the things I've tried:

Enabling and disabling skip unchanged frames.
Changing the anti alias level from 0 to 2 to 16 and back - I thought perhaps the pre-shrunk anti alias image was rendering by accident instead fo the finalized condensed image.
Changing frame rate.
Intercepting stage resize events and locking further resizes for half a second each time the stage is resized, thinking perhaps a rogue event was dispatching and resizing briefly incorrectly.
Enabling and disabling the support higher resolutions and support browser zoom features.
Installing the debug version of the PPAPI Flash Player and enabling Starling error checking.
Killing context manually and slowing down the video to see if that provokes the effect - however on context restore everything comes back right away at the right size.

None of these steps have mitigated the problem or provided any insight unfortunately. I've been searching to see if there are any reports of Stage 3D rendering issues like this in Flash Player to no avail, and I can't see where I go to post on Adobe's support forum - apologies if I'm missing something obvious there.

Has anyone else encountered this issue or had it reported by users of their product? And does anyone know if we have any known issues of this nature for Starling or Stage 3D in this setup?