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I've had a few units, two maybe in the last few weeks, that stopped during the loading of SZ1.52.  Some of the units I had sitting around had an older firmware, so I like to test things out and load the new one.  I haven't noticed any issues on the dozen or so 1GHz I recently shipped.  I didn't have to load SZ1.52 as I'm guessing it was loaded by Askarus or GC during testing.
				
			
	