Caption problem with the Bootstrap Carousel Add on
This may be a shot in the dark. I also had this happen yesterday when using bootstrap carousel, and though I didn't take the time to fix it I thought it may be because I had set the classes for the carousel images to "pull-right" which essentially floated it right. I have noticed the captions are set as "position : absolute", so I think what happens is that once you float the image, the carousel-inner DIV no longer has a set height, so the caption disappears as the DIV becomes so thin it essentially disappears.
As I mentioned, this is just a thought and I haven't actually tried it yet. So you may want to set the height of the inner div manually and see if it shows?