shudder at 45mph

[Highrisk]

She took it in once before for the post-head-change shudder. They said it was pretty far out of alignment, so they "fixed" it.
Funny, I didn't feel any pulling or other alignment problems before. Why would a new vehicle that's been dealer maintained be out of alignment with 10,000 miles on the clock? The tires aren't cupping, nor do they show any irregular wear patterns.

Regardless... they re-aligned it, and it didn't fix anything. We'll see what the techs say tomorrow.