Server 2008 - Safari Beta 3 crashes on launch: DEP problem?

Question

On Server 2008 (Standard, June CTP, x84), Safari Beta 3 crashes as soon as it is launched. My guess is that it's a Data Execution Protection (DEP) problem, because the error text and icon are similar to those involving DEP violations.
Has anyone encountered this behavior - or solved it?
Details:
1. I actually did solve it, using some combination of adding Safari-related dll's to the DllNXOptions Registry key, and using the latest nightly build of WebKit.dll. Unfortunately, I can't replicate my success.
2. When Safari is launched, the Menu bar and URL bar are displayed; then the error message appears.

Answer 1

Update 2: this can be fixed by logging on as another user (User2) and deleting the profile of the user (User1) for whom Safari won't launch.
When User1 logs on again, a new profile is created; Safari launches and runs properly under the new profile.
At the time I noticed the problem, only User1 had logged on. As a guess, I logged on remotely as User2 - Safari launched and ran properly. That suggested that something about User1's original profile was the cause.