Very interesting.... I hate to think that Tacoma's QA didn't scrutinize your guitar VERY carefully as one of the early, new necks... Apparently, this got through somehow.count savage said:It's the single truss rod, Chazmo. Don't know if that had any impact on this or not. But it was built after they abandoned the dual truss rod concept, though I see there are places on the Guild website where they're still claiming dual truss rods.
I'm pretty sure all new ones are being made this way now, count (you can ignore the Guild website), including all the -412 and -512s made in New Hartford since mid-2009... I know I've played a couple since the change, including a Tacoma that had no issues.
Good luck.