Two things.
v1.2.0 is approved and live. It should update itself — check chrome://extensions if you want to confirm you're on it.
v1.2.1 went in right behind it, fixing something I found straight after submitting: the WatchUSeek sale forums returned nothing at all.
WHAT WAS WRONG
On a forum index — say Watches: Private Sellers and Sponsors — the extension found zero listings, on a page holding 41 sale threads.
The cause: XenForo puts the same heading element on both a forum index and an individual thread. On an index it holds the forum's name; on a thread it holds the thread's title. The extension treated any such heading as proof it was looking at a thread, so on the index it went hunting for a starter post, found none, and returned nothing. The URL would have told it the truth; the heading check overrode it.
Page type is now decided by the URL and by actual post content, which genuinely separate the two. Measured on the private-sellers forum: 0 listings before, 35 after — DeLaCour Promess at $1,450, Ikepod Seapod at $1,650, a Datejust 36mm at $7,200, prices and sellers parsed.
Thread pages are unchanged: still one listing from the starter post, replies ignored.
WHEN
1.2.1 is in review now. Same permissions as the build Google just approved, so it should be a routine update rather than another full review.