According to a report published in Greece, a Nokia Lumia 930 received a surprise OTA update to a preview build of Windows 10 Mobile. The report noted that the OS was host to an inordinate number of bugs, which is not that unusual considering that this is still a beta version after all. One problem that was mentioned in the report was the propensity of the phone to heat up to the point where it became annoying.
Apparently, other tasks besides running video games caused the Lumia 930 to run hot. Even with just the launcher running, the handset became unbearably warm. Hopefully, the crew in Redmond will be able to go through all of the bugs, including issues with the temperature, and resolve the problems.