[Plugin: NextGEN Gallery] Gallery Showing Vertical

check the number of columns to display from gallery options..

markzero: I had the same problem. In my case I had moved the blog to a different domain and server, so I had exported the database, made the necessary changes for the new URL, and imported it to the new domain.

Your situation might be different, but what I found out by checking various things on this forum was that nextgen was NOT automatically writing a link to it CSS files to the header.php file of my theme. Maybe there is a way to get this to work automatically, but I just made the link explicit in my header.php file. I added this above the </head> tag:
<link rel=”stylesheet” href=”http://www.mydomain.com/wp-content/plugins/nextgen-gallery/css/nggallery.css&#8221; type=”text/css” media=”screen” />

After that, my thumbnails were back to normal, in rows and not in one single vertical row. I hope that helps.

For the forum thread about the missing link to the CSS file, check out: http://ww.wp.xz.cn/support/topic/328962?replies=8

RESOLVED.

Like so many issues it is in the CSS. If you look at the css file nggallery.css you find the following statement:

.ngg-thumbnail {
	float: left;
	margin-right: 12px;
}

For some reason this is not working in the orginal file re-write it

.ngg-thumbnail {
	float: left;
	margin-right: 12px;
}

and it works.

DON’T ask why – it just does.