This is not reproducible with JDK6 any graphics mode or JDK7 with d3d mode on mac.

In j2d mode, any application need approximately 10 seconds to come out in one cases, in other cases a grey window appears, and stays for 10 seconds, and only after that content appears. And this issue is stable in reproducing.

That is actual for 2.2 too (I checked b03).

This can be related to this issue: RT-20819.