1,5 to 2.1 Droid Eris
I installed the PB001mg on my first Droid Eris. Everything worked fine except for a few Force Quits now and then. I was able to run apps that would not run under 1.5, such as Google Goggles, Google Maps Voice Turn by Turn directions, Thickbuttons, etc. I did notice that in the Market, there were many newer apps, many of the same apps, and missing some of the apps in the Market that came with 1.5.
After a couple of weeks, I started having problems with scrolling Right to Left and Left to Right. Enlarged web pages would move to the Right, like they were being pulled by a spring, and I could only see the Left hand side of the page. If I had the Home Screen displayed, it would suddenly scroll to the last screen to the Left, and I could not move back to the Home Screen at all. This effect would come and go through out the day, at random. When this happened, I could not press on the Home button, Menu button, Phone button, etc.. If I tried to scroll to the Home Screen, it would just spring back to the screen furthest left. If I was typing in a Text Field, the Cursor would move left, in front of the first character and I could not use the Trackball to move it back Right, to enter more text.
Could this be related to the 2.1 firmware or was this a defect in the phone? I returned it under warranty and was sent another phone, which is of course, still with 1.5 firmware.
I am leary of doing this again unless I know it is not related to the 2.1 firmware.
When I upgraded to 2.1, I just put the pb00img.zip file in the root directory of the SD card and followed the directions to boot the phone.