RPS Image Gallery was updated today to provide additional support for including captions with images. The WordPress plugin now allows adding captions using the description field, which provides HTML editor tools for a convenient way to markup text.
RPS Image Gallery has always allowed captions to be entered into the caption field, which also supports HTML tags but does not provide a HTML editor.
Red Pixel Studios added support for the description field as we suspect people will want to use this field because of the editor tools.
A shortcode attribute defines whether the caption field or description field is used. Details are available on the RPS Image Gallery plugin FAQ page.