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Safe mode is pretty obvious. Springboard restarts and all your themes are turned off, it's just a black background. A big pop-up message which takes up most of the screen says it's in safe mode and gives you a power menu to restart/reboot etc.

Mine never goes to safe mode anymore. The only time it has is after installing a buggy app.

Ahh thanks for the info. In which case i have never had the pleasure thankfully. :)
 
Very rarely do I go into Safe Mode.

The last time was because I installed "LockDockBar" which isn't compatible with 3.0
 
Mine frequently did when I first upgraded to 3.0 and JB'd. Not sure what the causes were, but at some point on a vacation, the phone started rebooting constantly and I had to restore.....when I got back home I re jb'd, but there were a ton of updates. All were updated, and I haven't seen a frown face Safe Mode since. My guess is that you've something installed that's not 3.0 compatible.

Right now I've only got #G unrestrictor (that doesn't exist anymore), winterboard, and a theme that I ssh'd.
 
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