Frame rate stutters regularly in Chrome + Flash

Hello.

We're working on a virtual art gallery, and building it for both Web Player and Flash.

Here's an example of a gallery: http://answers.unity3d.com/questions/275016/updatefixedupdate-motion-stutter-not-another-novic.html

To see the problem, turn off the Web Player in Chrome (chrome://plugins), and open the link. (If you don't disable the Web Player, the link will open in Web Player, because we support both.) Then use the arrow keys to move forward and spin around. You should see a very noticeable and regular stutter.

If you have any thoughts what might be causing Flash + Chrome in particular to stutter like that, let me know. I'm fairly sure we don't have anything extra happening at those time intervals, and profiling in the editor shows no noticeable spikes. The fixed update fires every 0.01s, but we don't have anything happening on Fixed Update, or any physics going on.