A small amount of developers who have downloaded Beta 4 of the 3.0 Firmware are reporting that a “pink screen of death” appears after installing the Software.

The pink screen of death that shows up in this Beta disappears for most when they restart their devices and may have been caused by the way they install the Firmware. A majority of those who have been plagued by PSOD installed the Beta Firmware through Xcode instead of downloading the iTunes 8.2 prerelease and using that to install but the root cause is still unknown.

This isn’t the first time developers have been hit with a pink screen of death. When Apple was late in seeding out the third Beta for the Firmware 2.0 last year, the current Beta expired and rendered most iPhones and iPod Touches used for development inoperable.

Via: The iPhone Blog