Went back and checked the IBU's and you came in pretty close at 91. I think the original recipe called for 95, so I was wrong. Still curious to hear what may be causing the off-flavors in your beer. Is it reminiscent of DMS? Were your grains fairly fresh and freshly crushed?
Definitely not DMS, grain freshly crushed and pretty fresh considering I buy in bulk, but store ait-tight and run a de-humidifer in my brew room where the grain is stored. I might bottle a 6-pack and send it off to some folks for tasting. I will pull another sample tomorrow and see if I can get a better descriptor.
I just tasted the 2nd batch following this one and it is clean with no signs of "that" flavor. I am leaning toward some sort of funk in my Therminator from that day or something with the Chinook hops I used (ordered for this batch from NB...came in Hopunion bags)