the Place Gun in InDesign CS6 has several bugs. I did not found a bug report here, so here is mine.
When selecting several images or a multipage PDF,
- the image previews, when hitting the arrow keys do not change (the images to place are changed in background, but not the preview)
- the little blue number indicating how much images are retaining, shows one to much after placing the first image
- after placing one image, the preview will stay at the last placed image
Here is my video report: