August 4th, 2010, 12:32 AM
Join Date: Nov 2009
Location: Rochester, NY
Device(s): Motorola Droid, HTC Thunderbolt, Samsung Galaxy Nexus
Carrier: Not Provided
Thanked 59 Times in 50 Posts
The general answer is this:
You should always do a backup, whether you plan on wiping or not, just in case.
You should usually do a wipe to prevent issues.
From my experience, with 2.2 ROM's, you really can safely flash to a new one without wiping anything. I've done it plenty of times without suffering any negative consequences. It is still a good idea (for the purposes of knowing that everything's working as it should) to wipe though. Since most of your apps restore through the Market, and other apps as well as app data can easily be restored through Titanium, it isn't too much hassle.
Feel free to go ahead and do it without wiping though. I doubt you'll run into any problems. Just make sure to do a backup first in case you do.
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