Apparently the 'problem' is with DTS-ES - If some speakers are set to 'small' you still get no LFE, but some output is generated to the sub due to redirected bass, thus disguising the problem and making it hard to diagnose. Sub output and LFE are not synonymous. Scott or someone from Outlaw will announce what the engineers find as soon as the problem is well defined if past performance is any indicator.
Too bad the firmware isn't flashable - it would save somebody some money in the near future I bet.
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Charlie