Despite pulling the release of the new build 10536 of the Windows 10 Mobile Insider Preview, a few folks started reporting they'd installed it anyway.
Now, Microsoft's Gabe Aul has cleared up what actually happened and how widespread it was:
"@Fetandrey Yes, there about 200 installs of 10536.1003. We were staging to release and a few successful scans happened before pulling."
Certainly not a widespread thing but it also shows just how late in the day Microsoft decided to stop the process. Those who installed will have to revert back to Windows Phone 8,1 before being able to install any future Windows 10 Mobile builds. The very reason the build was pulled.
The actual build will be pushed out in the coming days.