Had you been idle on GJ for a while? All of my icons over there got deleted because my accounts idled. They apparently do that from time to time, but they won't say how long a time-frame an account has to stay idle before that'll happen.
What good are 2000 picture slots if, after being out of town/netless/in the hospital/whatever for a few months or something, you have to reload them all again? I definitely prefer IJ. Anyone who saved up for an LJ Permanent Account can buy five of them over here while they're waiting for LJ to get off their butts and sell their version.