Debug units unworkable due to endlessly looping error message.
Various developers and studios are claiming that their debug PS3 units are failing from suspected internal-clock-related hardware errors.

A multitude of debug consoles – crucial to the development of current PS3 projects – have been thrown into a rebooting cycle, due to an endlessly-looping error message.

The issue comes as a separate issue is affecting retail PS3 consoles, though both problems are thought to be related.

Source:develop-online