Sirs, I am having exactly the same issues.
I am using the media library to insert my images into a post
Inserting an image with caption and the cursor is in the grey caption box and I cant get it out to insert the next photo.
If i do insert it stays in the caption box.
I am new at wordpress and themes - so please be patient!!
I am using Imbalance (not imbalance 2) and firfox as my browser.
it is so frustrating since I want to go live and I'm a photographer, using wordpress as a photographic blog.
Any help will be greatly appreciated