So I just spent ALL day fixing my phone after trying this! Ha!
I started with 2.3.9 w/ FlyX and NexTheme. Ran awesome! No problems! So I decided to try to update to something newer, just like we all like to do. I downloaded 2.3.15 and updated to it, wiping data and cache, and mounting system. Starts up fine! still has FlyX boot animation and Nextheme! Weird! But all works well, root and all. My next task was install the newest tranquility. This is where it all went to Shit!
I Lost Root. Gone. crap. But Oh! I can use the Droid 2 method! Man, it took me 4 hours to get adb running correctly! There are a thousand posts out there that all say to do a different thing to get adb!! First problem: what usb mode to put it in? I try PC mode... I change the unrecognized drivers in Device Manager. Nothing. The debug icon is not showing up on my phone even though it is switched on! So then I try Media Sync. Nothing again. Next I try USB Mass Storage. Ah HA! the debug shows up! Go in to device manager and update the right driver. adb devices shows my device. Awesome! But nothing works! No permission! So my final option is Charge Only. Bam! This works! I update drivers! I start adb pushing files and following directions. I get to cp /sdcard/su /system/bin/su. It craps out! Damn! More research... Oh! change bin to xbin! fixed! Finally!
So root finally happened! But only after my phone froze on the M 17 times and rebooted by itself 47 times when trying to apply the rageagainstthecage file!
So now I install Bootstrap and go into recovery and do a restore of my 2.3.9 image. All is well again!! Im back on 2.3.9!!
I guess where this long ass post is going is: 2.3.15 updated no problem, Tranquility, not so much..
I suppose I will just wait until a Rom Manager version of 2.3.15 comes out, along with Obsidian. I am more of a 1 click kind of guy..
FYI lol.