SquareThumbnails
I rewrote the original post.php file. Now it generates automatically square thumbnails. If the original file isn't square, the script just takes the middle of the original file.If you want square thumbnails on your folderblog page, just download the zipfile containing the modified post.php, unzip it and upload it to your site.
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You can set the height and width of the thumbnails with the variable $thumb_maxwidth in vars.php.
My version is a quick and dirty hack (but it works...) for folderblog2.
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