Before today’s update, I had hacked the plugin by simply adding the current version of jquery.nivo.slider.pack.js (v 2.6) from the Nivo Slider website. Earlier versions of Nivo Slider were incompatible with JQuery 1.6.1, which WordPress uses now as of version 3.2.
My hack of this plugin worked fine, having only replaced the .js file, but when I tried to replace the stylesheet with the Nivo Slider 2.6 version stylesheet, things broke.
This update does appear to fix things, except I’m experiencing the same navigation glitch described above: the navigation arrows show up on the first image (on hover), but disappear and never appear again on succeeding images. The bottom navigation is present and works fine.
Dev, do you think you might be able to update this? I love this plugin… I’d been wanting to integrate a slider with NGGallery for months, and had just started writing my own plugin to do this much less elegantly when you released this great plugin and saved me the trouble.