Formatting Issue with Image Caption – Stripping out caption code

All of a sudden (since before the latest update), when I add image captions, they are not formatting properly. In fact, they are showing up as regular text along side the images.

It will look fine in the post editing screen, but when you preview it, the caption becomes regular text.

Here is the code in the editing screen:

[caption id="attachment_4243" align="alignleft" width="300"]<img class="size-medium wp-image-4243" title="Angry woman with cane" src="http://myhomecareblog.com/files//2012/01/angry-woman-300x244.jpg" alt="Angry woman with cane" width="300" height="244" /> Angry woman with Cane CAPTION[/caption]

View code when you look at it live and you see:
<img class="size-medium wp-image-4243" title="Angry woman with cane" src="http://myhomecareblog.com/files//2012/01/angry-woman-300x244.jpg" alt="Angry woman with cane" width="300" height="244" /> Angry woman with Cane CAPTION

Why is it stripping out the caption code?