The thumbnails for the next-gen gallery wordpress plugin show up very skinny. However using the nggallery widget with IE8 Webslices seems to work fine. I tried adding “webslice=1” or some variation of it to include this webslice option for IE8, however, I don’t think it was implemented.
A great solution that solved my problem was found on the link below. You just need to add the following to your style.css:
keywords: nextgen gallery ie8