The buttons are frickin' tiny for fingertips and getting the right top/bottom button can be a challenge. The inline BR popup defaults to covering those buttons.

For some reason while the thumbnails show up fine in newer.php's thread preview, they less consistently show up in the actual page, regardless of the number of posts or images. This might be just bad luck.

Touching them opens them in a new window *and* triggers expansion.

The 'download' button opens the image in the same window (which it doesn't do on any desktop browser). Good job, WebKit.