Another Froyo update for Nexus One users?

The other day, we were told by Google that the FRF85B build was the official Android 2.2 release as it was sent out to Nexus One users. Earlier today, some N-One users reported receiving another OTA upgrade of Froyo-this time build FRF91. This mysterious new version could have been sent out to correct a bug and is being received by both T-Mobile and AT&T users of the phone. We would imagine that Google will have some sort of explanation for this upgrade. Assuming that the Nexus One is now all finished with the Android 2.2 upgrade, the focus will shift to the next Android handset expected to get Froyo, the Motorola DROID. As we previously reported, the DROID is penciled in for its update later this month although a small subset of the model's owners were expected to have received the upgrade Monday night.

HTC Nexus One Specifications | Review
Motorola DROID Specifications | Review

source: xdadevelopers via AndroidGuys