Mishaps with ‘ezbuybutton’

I’ve been browsing for useful widgets and things to add to my WP site, and came upon ‘ezbuybutton’. This seemed just what the doctor ordered for making it easy for people to order my books when (and if) they stumble upon them on my website. I installed it, made up a ‘Buy Now’ button for Lord Talon’s Revenge, and duly added it to the page for that book. It seems to work like a charm. You choose your preferred reading device, your favourite ebook retailer, and hey presto! a new window (or tab) opens up, taking you right to the place where you can place your order.

Just one problem: As soon as I did this, all the paragraph breaks disappeared from all the posts on the whole site. Every single post displayed as a continuous mush of text. This, needless to say, is not acceptable.

I have sent an SOS to the developers, and deactivated the plugin. Meanwhile, if anybody can suggest an alternative or a workaround, I am all ears and humbly at your service.