wow, lots of new posts to reply to:
1) I'll be visiting my LHBS this friday if he's open (odd hours, this guy) so maybe he can help
2) I did not use the pump on the first batch for aeration, I just poured vigerously as per "How To Brew" (I foollowed the instructions there to the letter) so I doubt that's the cause
3) LME for this latest batch was ordered direct from Northern Brewer, so it should have been fresh, right? They seem reputable.
4) Bottles: for both batches I used commercial empties. First time around I scrubbed them good with dish soap now that I recall when I first got them, but then before bottling I soaked them in one-step overnight, then rinsed them in pre-boiled hot water. Second time around I thought better of this, so after I drank a beer I would just rinse the bottles out with tapwater really well and dry them. Then before bottling I soaked them in B-Brite for an hour or so, then sprayed on some star-san with a NEW spray bottle. Two different processes, same soapy flavor.
5) I'm not dumping this batch. I'll let it age till the cows come home to see if I can save it, it just seems unlikely as i'm 6 weeks in the bottle now and it tastes worse than before... then again, it may have just been more noticible in the bottle I tasted last night and I had already eaten/drank other things.
6) I pour very slowly, down the side of the glass. I usually hold it up to a light while I do it so I can see the yeast cake and stop pouring before any gets in the glass.
This evening I may get brave and taste the yeast cake itself... that may help to determine if that's the flavor or not until I can get a second opinion.