html in captions causing extra tags to appear

I’m using NextGen 2.0.4. together with WP Simple PayPal Shopping Cart 3.9.1. My server was recently upgraded to PHP 5.4.22. My site was fine until these recent updates. My problem is if I use html tags (specifically <br />) in the captions, the last line of text is duplicated above the image, and is hyperlinked to the image. This line also displays an additional "> at the end. When I remove the <br /> tags, the problem disappears, but of course all of my text is displayed on one line, which I don’t want.

I’ve tried disabling and activating all of the plugins, including NextGen. I’ve also tried using NextGen without the shopping cart plugin, so I know it’s not the shopping cart plugin. I’m simply out of ideas and would appreciate any help.

Site example

https://www.ads-software.com/plugins/nextgen-gallery/