New ImageIngester version: sizes of thumbnails in the chooser can now be changed
For OS X and Windows, the new version is 3.4.01. Ineffective for raws that don’t include a sufficiently large preview image, or for raws that the thumbnail chooser can’t process. Ingestion proceeds normally whether thumbnails are shown or not, of course. Works fine for NEFs, CR2s, JPEGs, and a few other formats.
You choose the size via a drop-down on the chooser panel.