Isn’t it annoying when you have a site with a reasonable number of categories, say 15, and WordPress only shows you the first 8 in the category checkbox widget? Ugh, scrolling is annoying.
Try this super-simple plugin. It’s so simple that the plugin’s content is embedded into that link (seriously). There, now you’ll never see a scrollbar in the category widget. You’re welcome!
(Requires WordPress 2.7… upgrade already!)