I seem to be having a similar problem, but only in Chrome (have not tested IE). The image thumbnail sizes are ignoring the settings in the widget.
You can see it in the sidebar here: http://rebeccabgiddings.com/blog
Having the same issue, but andrewrench, it looks like your thumbnails are sizing correctly now? Did you come across a solution you can share?
Confirming that the thumbnail height is not resizing properly in Chrome. Used to work well, but something changed recently that is affecting the resizing.
I just fixed it with CSS:
li.pins-feed-item {
width: 100px;
height: 100px;
overflow: hidden;
}
I just uploaded a new version 2.2.6 that includes the CSS fix for Chrome. There seems to be some conflict specific to Chrome with the nailthumb.js process. I honestly didn’t have time to test this new version but it should work now. Please let me know if it does or does not fix your issues.